I think most people care about the final output, especially the market. This is why many artists complain about mainstream art, because it genuinely isn't interesting from an artist's perspective.

I'm not too familiar with visual arts, but I know most jazz musicians make a living off of teaching music and doing concerts where the attendees are just other musicians. It's very much centered around technique and human performance. (the term musician's musician is also used here)

Meanwhile, the average person think jazz is noise.

So my point is, saying "What makes music meaningful..." sounds more like an elitist jazz musician take. (I'd say jazz musicians tend to be more self deprecating than elitist, and often make light of the genre and how people perceive it!)