I feel we need a term for "copyright bros".
The more important point is that social media companies can claim to OWN all the content needed to train AI. Same for image sites. That means they get to own the AI models. That means the models will never be free. Which means they control the "means of generation". That means that forever and ever and ever most human labour will be worth nothing while we can't even legally use this power. Double fucked.
YOU the user/product will not gain anything with this copyright strongmanning.
And to the argument itself: Just because AI is better at learning from existing works, faster, more complete, better memory, doesn't meant that it's fundamentally different than humans learning from artwork. Almost EVERY artist arguing for this is stealing themselves since they learned and was inspired by existing works.
But I guess the worst possible outcome is inevitable now.