I agree that IF you like what you are doing, you'll be good at it, and therefore you'll eventually be paid well for it. I also did a tour at as an aerospace subcontractor, this was 16 or 17 years ago and the work was great.......the pay sucked. It was alot less than that 20-22 per hour range. That wage right now is not enough (22) today. I agree that top quality work is expected, infact demanded as it should be. I would not want to fly a jet or plane if it was any other way. The job was easy. We had a machine shop to make up any special tooling that was need to weld any part and most of the work was done on a spin table. You get good quick or you get run off. I wish I was still there, but it wasn't to be. I had to go because the place got bought by new owners who shook the place up and rather than play politics to keep my job over someone else, I just went back to pipe welding. Still at it and luving it.
Regarding money "in the field"........IF you can pass a 6G pipe test on carbon & stainless pipe, you will earn 40-50 grand your first year. It really depends on who is hiring as to whether they will take a chance on someone without experience, but the right training may be enough. The contractor I work for will only have their most experienced hands doing x-ray work because it cost less in the long run to have minimal rejects than to take a chance on someone who is green. Still, there is plenty of pipe to be welded where high quality is not so much of a concern so a newbie welder can get some good welding time under the hood and there he/she can get the experience that is needed to stay employed. They will still need to pass a 6G x-ray to get hired, but probably won't have that pressure once they get hired.
Be well,
Hawk