Everyone is not perfectly OK with training language models on copyrighted text. It's just that evilCorps do it anyways, and there's nothing anyone can do to stop them. I can't do anything. At best, I could get a Twitter account and complain to the ether. The copyright holders can't do anything against the might evilCorps, but that doesn't make them okay with it. The fact you believe this is just sad, and exactly what evilCorps want from you.
This goes beyond fair use or satirical/comedic effect. They are training their models to output text in the style of the authors being absorbed. The style of is exactly the artistic effect that is being copyrighted.