How did we even get here? MIDI sequencing for rhythm tracks goes back over forty years now. Already in the 1980s there was a reaction against overly precise electronic timing and an interest in "humanizing" the groove. Solutions did appear. Why don't they see more use? Or maybe they do see plenty of use, except that then listeners assume it's musicians playing. As long as any significant fraction of music is naively quantized, there is something to complain about.

One observation I have, by the way, on a related note, that I've heard some AI-generated vocals which blew autotuned humans out of the water. Oopsies, eh?