How do you stop a thought? His will is intangible. His will and desire to harm the planet and its people wouldn't stop with the cells being told to stop attacking the body. His desire still remains and would continue to tell the cells to be malignant.
Aerith's cure isn't destroying Sephiroth's will. It's purging the command from within the Jenova cells, and returning the cells to the command of the host body. I'll get into detail on this below.
They are the issue and listed as part of the cause in all definitions of the disease. You can't remove the biological element and cause of the disease. Sephiroth's will is one half of it. The 10th Anniversary says so clearly.
The presence of Jenova cells allows someone to contract Geostigma, of that I am totally aware, and agree. There's no way that someone could have a disease without a physical object inside of them. However, the presence of the cells alone isn't an issue. They're benign, or in most cases beneficial to the host, most of the time granting the host powerful abilities.
Within the FFVII universe, Jenova cells can still be controlled by "their" mind, (previously Jenova and now Sephiroth), even when seperated from the body - this is what allows them to gather and cause Reunion. When the will that controls the Jenova cells commands them to do something, they respond, just like moving your arm, even if they're not attached. That's how Sephiroth is able to manipulate those that have Jenova cells within them i.e. Cloud in FFVII, and cause the cells to attack their hosts in Advent Children.
If you remove the ability for the cells to communicate with "their" mind, they'll go back to responding to the host body's commands. As a cell that can mimic other beings, they wouldn't be detected by the immune system as a foreign body, and would continue to remain in the system, and provide nothing, or the benefits that they previously did.
- Geostigma refers to the effects of the host body's immune system fighting against the Jenova Cells in their body. This is caused by the fact that the normally dormant cells are being detected as a foreign substance, and are being attacked by the body's immune system. The Jenova cell's greater strength over the Human's cells means that eventually it will kill the host.
- Geostigma does not refer to anyone with Jenova Cells within their body - this being more fully clarified by the fact that we know that there are individuals with Jenova cells in their bodies after Advent Childrem, but there isn't anyone with Geostigma as was stated in the guide.
- Therefore, if the cells are not being forced to attack the host body, and the physical symptoms (bruising, black pus, etc) have gone, and or been healed, the individual will no longer be suffering from Geostigma. Their Geostigma will be gone, but the Jenova cells remain.
That's a good analogy, however there was never a plot element in the game that was stated to have cured people of mitochondrial infection. Aerith's rain would be that cure. Aerith's rain didn't eliminate or kill Sephiroth, which would be the equivalent necessity in order to stop Geostigma without actually removing the Jenova cells.
The cells have to be returned to the control of the host. In Parasite Eve, Aya's Mitochondria is different and allows her to maintain control of her body, and even use her Mitochondria to gain unique powers. Essentially Aerith's rain cut of the Jenova Cells within a host from recieving commands from Sephiroth. It affected the Cells, not Sephiroth's will. Covering people's ears is essentially the same as preventing someone from talking to them, except like someone's will - you can't stop the words once their out, but you can still have ways to prevent them from being heard.
Except the program wouldn't really be gone because the source code (i.e. Sephiroth) would still remain and his hostility would remain. As long as he exists and wills it, Geostigma would remain in effect through Jenova cells.
The 'program' would still be removed from the cells if the host body is put back in control of the cells, and stopped from recieving commands from the source code.
It survived for 2000 years because they were left mummified in a geological stratum. Furthermore, if Jenova was as immortal as you asserted, then none of the bodies would have been capable of being defeated and Jenova would've assumed control of its Reunion itself before AC. All that remained was a small piece of its neck that didn't try to regenerate. And after that, nothing more was left when Sephiroth was defeated.
And you're still not accounting for the fact the purifying rain purged the Lifestream of the biological impurity within it and made it clean. How would her rain, that just as you put it, cures damage tissue, be able to purify ethereal lifestream? The lifestream wouldn't be functioning with Sephiroth's will anymore so what's being done to it? You can't say its his will being removed.
The bodies that have Jenova Cells can still be destroyed. I'm not saying that they're invulnerable at all. The cells just reform even when ripped apart. Without any will to guide them, they're at the command of the host bodies that they're inside. With Jenova's head being the last remaining un-integrated cluster of Jenova cells it's still essentially a seperated limb of Sephiroth as the mind - it can't form Reunion on its own.
All spells use Lifestream energy in a way - materia is just condensed Lifestream. When cells break apart in the FFVII Universe, they become Lifestream, so it's not very hard to iamgine that something that could cure cells could also purify Lifestream. The Lifestream refers to the current running through the Planet, and that current that is the life of the Planet is now free of the Negative Lifestream that was trying to strangle it.
No. You're ignoring the fact the creators themselves equate Geostigma with Jenova cell presence as well.
No I'm not. You're misinterpriting it as anyone with Jenova cells that was suffering from the disease Geostigma, even after the body stops attacking the cells has been removed still have Geostigma. As stated before - if Sephiroth's will is destroyed, and the cells remain dormant in someone's body, they no longer have Geostigma. Proof being - everyone in Kalm in DoC with Jenova Cells as seen by the Deepground soldiers doesn't ahve Geostigma, as Geostigma was stated to have been cured in AC.
It's akin to AIDs, dude. AIDs is caused by the HIV virus. Geostigma is caused by the Jenova cell infection. You can't cure AIDs without first tackling the viral infection caused by HIV. Geostigma is the result of the Jenova cells in the body attacking the body and causing an immune response.
That's a half assed cure then. She isn't fully curing the syndrome of Geostigma where the root of the disease is the actual biological substance of Jenova cells.
If Geostigma was caused by the biological substance of Jenova Cells, then any SOLDIER would have been suffering from Geostigma long before FFVII. This is not how it works. The root of the disease is that the cells being recognized as a foreign and hostile substance, instead of integrating with the host's bodies like they typically do. This is caused because of Sephiroth's influence on the cells making them hostile, instead of being dormant/beneficial, and meaning that they aren't fully under the control of the host.
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