There are hundreds of bands who play three-chord doom or mindless-shredding grind who just learned one thing and do it well, and who play to hundreds of people multiple times a week (often including me). We go to see these bands not to see what they can play, but to see what they are saying with what they play.
This is why I feel that I can never describe LLM-generated content as 'art'. Art is about the story. People will go and see a punk band who only know three chords if they play songs about things that resonate with them. Bit of a tangent, but this is the same reason that I genuinely believe that if you could bio-engineer a steak that tastes exactly like one from a well-looked-after cow from a notable breed and a good farm, most people would still prefer the cow. The story matters - the fact that a person put effort and experience into something really is important.
"This solo is sick" is a fun plus-point, but it doesn't matter if the song doesn't mean anything to you. If proficiency was the only thing that mattered then we'd all be listening to the worst kind of prog.