As much as I hate Facebook, I think that seems pretty… reasonable? These AI tools are just tools. If somebody uses a crayon to violate copyright, the crayon is not to blame, and certainly the crayon company is not, the person using it is.
The fact that Facebook won’t voluntarily take liability for any thing their users’ users’ might do with their software means that software might not be useable in some cases. It is a reason to avoid that software if you have one of those use cases.
But I think if you find some company that says “yes, we’ll be responsible for anything your users do with with our product,” I mean… that seems like a hard promise to take seriously, right?