Setting aside the usual arguments on the anti- and pro-AI art debate and the nature of creativity itself, perhaps the negative reaction that the Redditor encountered is part of a sea change in opinion among many people that think corporate AI platforms are exploitive and extractive in nature because their datasets rely on copyrighted material without the original artists’ permission. And that’s without getting into AI’s negative drag on the environment.
While I support your whole statement, I think the beauty of art lies in the message, vision or emotion that the artist wants to convey to the world through a visual medium. You can have a super realistic portrayal of a human and still prefer the art of Van Gogh because he shared his emotions through his art and people could feel that.