If I wear my wallet out in the open does that mean it's ok for you to steal it? Or if I expose my painting in a museum is it ok to copy and resell it? People that used to steal software used to claim that they just made a copy, they didn't steal a car. Yet somehow corporations prevented them from making said copies. Now we see people are taking the side of corporations stealing people's content. The content that they themselves don't want to be stolen. Weird world, and the markets are clearly irrational. This IP theft will backfire and it will be glorious.
If your art style can be put into a bunch of parameters (which it can) it can be copied by a human. Copyright of style is stupid and muddy, it's always a matter of people thinking "the magical humanity" not being possible to put into ones and zeroes.
Correct, but there are clear rules to how humans can copy things. Also humans don't usually need to ingest and store billions of parameters about anything to learn about it nor could they. If they could they'd be software.
The content that the people themselves posted to the Internet? I'm pretty sure that OpenAI didn't break into any artist's studios and steal anything.