the recurring discussion here has always divided at that line.. (art? or entertainment?)

the arguments set forth by the people in the discussion clearly show which side each of us weighs in on. And both points are valid. Not everybody wants to be an artist, and not everybody wants to be an entertainer. They are different paths that lead to different outcomes.

People who want to make money nearly always weigh in on the side of entertainment... mostly because the term "starving artist" has so often proven to be accurate.

In contrast, we are accustomed to seeing well-to-do entertainers on TV and in movies.

I'd say that those who see themselves as pursuing the art would be more likely to play for free, while those who are pursuing music as an entertainment business would not. Both of those conclusions make sense in the context of the person's goal.