I guess the key is to enjoy music. When music becomes a job, it has the tendency for the musician to lose the most important and basic fact - that music is meant for the masses, and first and foremost meant for enjoyment (be it listener or player).
My brother-in-law met a taxi driver the other day who used to be a jazz pianist for more than 15 years. After 15 years of playing "the same thing" in hotels etc, he lost passion and interest. Quit his job, and became a taxi driver. But he's now also teaching piano, which I believe he enjoyed more than playing the same repertoire again and again. He may not look good without the tux, but he is now enjoying it.
So, this thread is a good lesson for all of us. Any of us can fall into the trap. Remember, as was said elsewhere, "music is not a competitive sport". Doesn't matter who's better or worse. As long as I enjoy what I'm doing. Three cheers for hobbyists! We have the benefit of just enjoying making music without worrying whether it will bring bread on the table. And when we become better at how we make music, don't forget we were all once noobs, learning how to hold a guitar and where middle C is on the piano...
So, let's start checking ourselves and not be too hard on that guy - he could very well be us if we weren't careful (talking to myself here as well.....)!