I would say enforcement never prevents any crime and enforcement is about punishment not prevention. So when is it worth it? What level totalitarianism an authoritarianism is worth it? How much abuse and Injustice is necessary to assuage your fears about the other? Surely you're not going to sit here and tell me only fear of punishment is what stops you from murdering people?
What if we focused on resolving systemic issues that might provide motivation to prevent crime? What if we focused on rehabilitation instead of punishment for those that commit crimes anyway?
Sure, you can take any idea to an extreme strawman and shriek things like "authoritarianism!" but that means nothing.
While I honestly agree with the theme, the difference is that Meta wasn't looking to share them with others, at least not in their original form.
I can download terabytes of content to train my AI (hypothetically) and I don't think anyone but my ISP (and not because of IP issues, more for being a disproportionate consumer of their resources) would notice me, including and whatever industry I was using content from. It's the sharing that incurs the real damages.
Admittedly, Generative AIs are basically going to "share" the content (with someone, likely for a fee) as well but not in its original form.