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.
(2) Once you make something publicly available, anyone can learn from it. No consent necessary.
(3) Being upset does not grant you special privileges under the law.
(4) If you don't like the idea of paying for AI art, free software is both plentiful and competitive with just about anything proprietary.