[quote name='ambient' timestamp='1368633513' post='2079523']
Don't most musicians play music for other people, ie functions band, session work, even original music, not much point to it if people don't like it.
[/quote]
There's every point to it if the person doing it personally finds it fulfilling.
There are plenty of musicians out there who would be doing what they do whether they had an audience or not - they are driven to create music that means something to them first & foremost.
I'm talking about writing original music here - obviously the criteria will be different if you're playing covers in a tribute band, doing wedding gigs or whatever as in that context you are doing it solely for the entertainment of other people.