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.
You don’t usually call the audio engineer a musician though. The fact that you “want a string section” is the important part. Art is communication, if you fuck with the AI until it communicates what you want, that can be art, as long as you’re not trying to pass off that the fake brushstrokes contain any meaning. If you learn all the right prompt words to make it “good” and then Photoshop it to fix all the telltale AI glitches but the only idea being communicated comes from 6 random people on Deviantart smashed together, that’s not art.