People who have never found their paid work so emotionally satisfying are worse off, not better. At least professional artists have gotten to spend some of their working lives that way.

there is nothing stopping them from doing the thing that "makes them complete" for leisure like most other people. AI art doesn't stop you from drawing, it might very well impact the commercial viability of it for sure but all that's lost is that.

Exactly. People play chess, even though computers can beat anyone these days. Or participate in track events even though cars and airplanes are vastly faster than a runner on foot.