Then they presumably are fine with open weights models made by hobbyists by scraping publicly available art on boorus and such, yes? because they are neither made by corporations nor are they selling any product.

(to be clear, I don't think this is an accurate description of how artists feel about e.g. publicly released diffusion models. The core is not that it's made by "corporations" or the for-profit aspect or even the copyright infringement part, it's simply the understandable and not-at-all-unique-to-artists resentment at having your job or passion automated or displaced)