MNblockhead
A Title Much Cooler Than Anything on the Old Site
I feel like I understand where you are coming from, but I worry that attitude would put off a lot of potential new GMs. It is a game, not a job. I think it is okay to jump in and give it a try and if it isn't working for you, its okay to walk away.30 posts in and I'm rather surprised nobody's hit the real #1 GM's job yet:
Commitment to doing that job.
If you're not committed, week in and week out for however long the campaign runs, to doing whatever a GM has to do in whatever system or style you're running in order to keep the game going, you might as well not bother.
Also, not all GMs run campaigns. I would actually encourage more DMs to run one shots. I think that there would be more GMs, and more opportunities for me to not be a forever GM, if more people would run the occasional one shot rather than feeling like that have to run a long adventure or campaign.