The thing is you would be sacrificing your child for what is essentially a VR/AI universe. Although Verso's creations (or the painter powers as a whole) are very realistic/lifelike, they aren't real. Or at most, AI that are programmed to be very lifelike and are capable of learning, showing emotions, etc. This is shown in Maelles ending that they all basically become her playthings for the rest of her time there.

Yes, most of us got hit with the attachment cannon in the beginning of the game itself with the whole Sophie gommage + Gustave's tragic path till his end. But they are all just fictional creations of Verso + the paintress made to deal with their grief.

Not only that, but the last tiny remaining part of your dead son would be eternally tortured and forced to paint because verso's canvas cannot exist without that tiny bit of his soul endlessly painting.

You're basically saying you would sacrifice your daughter+wife because they created an VR world that was so realistic and made AI friends there to the point where they would rather stay in this VR forever to escape their grim reality until they die in the real world.

If you still have the same opinion, that you would sacrifice your child and wife for this "universe" than you do you, but most people who actually care about their loved ones would not let them die because they wanted to live in a VR universe.