True, but authentication won't stop people from using AI. It's kinda moot really, because it takes only a single user to "infiltrate" the platform, take the art and feed it to AI. And as we've seen, corporations don't give a fuck because nobody can threaten them legally - at most they pay a paltry fine and continue their shittery.

Besides, the beauty of Fediverse protocols is that you don't need to federate and distribute. One could whip up a Mastodon/Lemmy/Mbin/etc. instance without any federation, just their own little safe space, and even harden it against AI - much easier than writing your own platform, protocol, clients, frontend and backend from scratch.