While I agree about Adobe behaving more ethically, I suspect they simply talked to their customers, and decided they didn't have much choice. CELSYS, who makes Clip Studio, suffered a backlash and pulled their initial AI features: https://www.clipstudio.net/en/news/202212/02_01/
Probably didn't help that Clip Studio is predominantly used by Japanese artists, and virtually all models capable of producing anime-style images were trained on a dataset of their own, stolen pixiv art.
