AI replaces piece of shit adults that surround them, not other children.
If you believe the argument makes enough sense to justify replacing adults, then why do you think children will still want to play with each other, instead of just playing with AI? If anything, other children are MORE likely to display shitty behaviors than adults, given that you know, they're fucking children who don't know any better.
Have you spent any time around children?
I’ve spent years being one.