Including ending that remove the 6 months would made all other endings wrong ones, no matter the price (at least the mentioned).
IMO the 6 monts is set for next game or some continuation of the story. The "no known cure" from Arasaka has the same weight as "don't stop fighting" of Jonny.
And Alt only speaks for their perspective of cyberspace AI. Whenever you call her "DeUs Ex MaChInA!" or not.
But even if not, some stories don't have happy ending and that is good.
It is less "Done and done, can I have my dopamine now please and move to another" but more to make palyer think about value of life and what to do with limited time... give it up so a friend get a chance? Fight to the bitter end? Surrender and hope? Make youreslf a legend?
Plus V burned very, very brightly.... on a borrowed time already.
It odesnt matter, this topic is already locked in blind hate spiral sicne many many pages ago as Willenbrock pointed out.
It wouldn't make other endings the wrong one unless you meta game and go for the "correct" choices. All it does is cement the fact that you have no agency over your own fate. forget about V living on borrowed time, the player starts the game on borrowed time, can you ignore that? yeah it's totally possible, but why am I supposed to ignore the narrative in order to play the game? I don't play games like this for the gameplay, I don't care about achievement hunting or completionism, being asked to put my immersion to the side in order to fully experience the world you built is insane.
"But even if not, some stories don't have happy ending and that is good." good for some stories perhaps but bad for the type of game this was heavily marketed at being before the last minute stealth category switches, it's all a closed system, the game decides when you start, how long you have and how you finish.
There's a difference between sad endings and bad endings, these endings are just bad by virtue of having the same plot cancer tacked on, you finish the game by having your terminal illness say this isn't even my final form and that's it, that's the plot.
They said the story in C77 would be complete, it's not.
they said it would be rewarding, it's not.
Even if V had died at the end of her fight there would be catharsis, there isn't unless you put the gun in your own mouth, which reduces act 3 to a cutscene.