Alt says nothing about the cure, she only conducts diagnostics.
Yep, and the diagnostic is that the outcome is death, no matter what.
She's not a medical bot, she does not know whether there is a cure or not.
Nope, Alt is the Deus Ex Machina of the game, not a petty med-bot.
For the past 50 years, she has been in the network behind a firewall.
So you say, or so is what is believed, or so is what Netwatch want people to think. You have no idea of that. And frankly, I highly doubt that the Wall may stop AIs if they do want to trespass it, considering the Voodoo boys seem to go through time and again...
Helman is not talking about curing cancer, but about what to do with the chip. Alt has already solved this problem.
Vik does not say that there is no cure, he, on the contrary, tells V to look for a solution to the problem.
It's still an open ending.
In the Arasaka ending, Helman says that the cancer is killing you, that there is no cure and that V is dead in 6 month. Unless V gets digitized in the soulkiller program, which, considering what Alt says about it, is somewhat killing your soul (whatever it is) and changing you. V. is V. no more.
Vik presents solutions and tells you to set up your mind :
- bite the bullet
- end one of the 3 different story arcs (Arasaka / Nomad / Johnny), all having the same outcome.
This is lazy writing and storytelling.