I could say that guys that don't play full time are talentless hacks that lack the skills or desires to be a "real" musician instead of someone that dabbles in it.
If you spent more time at a non-music job than playing music you're just a hobbyist and most original guys I've seen are limited to one style unlike us cover band "hacks" who have to play rock, pop, R&B, country, dance, latin, blues and whatever else comes up. Also I'm killing it for 3-6 nights a week 4-5 sets a night and original guys might play 1-2 45 minute sets a month. Playing covers has made me a much more well rounded player and has taken my skills to a level I couldn't get to just "jamming out" once or twice a week and gigging once a month or so.
A former band member once suggested who is the the bigger sellout. The one that works a job he hates in order to have a "hobby" or the one that plays full time and makes a living at doing what he loves and gets to travel. Sure we play songs I'm not thrilled about but that's part of the job. Trust me I rock Mustang Sally and Wagon Wheel as hard as I hit it with something I really enjoy. I owe that to the audience.