There are many small artists who do this not for money, but for fun and have their renowned styles. Even their styles are ripped off by these generative AI companies and turned into a slot machine to earn money for themselves. These artists didn't consent to that, and this affects their (mental) well-beings.
With that context in mind, what do you think about these people who are not in this for money is ripped out of their years of achievement and their hard work exploited for money by generative AI companies?
It's not about IP (with whatever expansion you prefer) or laws, but ethics in general.
Substitute comics for any medium. Code, music, painting, illustration, literature, short movies, etc.
Yes, style copying is generally considered legal, but as another commenter posted in a related thread "scale matters".
Maybe this will be reconsidered in the near future as the scale is in a much more different level with Generative AI. While there can be no technological solution to this (since it's a social problem to begin with), maybe public opinion about this issue will evolve over time.
To be crystal clear: I'm not against the tech. I'm against abusing and exploiting people for solely monetary profit.