Making music is unlike any other "job". However good any non-musician thinks it is, multiply it by 10 (at least). No one understands what kind of "prep" time that musicians go through....the years of daily practice..all of the head trips (up and down)...the study away from the instrument and (for most us) the complete lack of job security....and on and on. But, non-musicians can probably never understand what an unbelievably liberating experience (emotionally) performing can be for a lot of us. It's like therapy. You can completely drain yourself physically and emotionally of stress during the course of a gig.