I don't think that's the case though. Obvious glitches like 6-fingered hands can be avoided by generating a bunch of samples and picking the best one, and less obvious glitches tend to be overlooked, not considered a "feature" due to an appreciation of abstract art.

AI art works best for pieces that need to fade into the background, like stock images and whatnot to accompany more important copy. If it's taking center stage, it needs a lot more hand-holding that probably makes it about as costly as just having a human create it.