I'm not sure where you got your info, but it doesn't cost "hundreds of thousands of Dollars" to attend a top gunsmithing school.
If you intend to go out on your own with a self-owned business, all you need is a Federal License. You can be a horrible gun butcher and still open up shop, there's no competency standards you have to meet.
Whether you make it in business is decided by the market.
If you're any good and have good businessman's skills you can make it.
If you have good gunsmithing skills and are a lousy businessman, you won't.
With all that said, whether in business for yourself or working for a business, in the end you have to produce the goods, which is quality work.
So what you're saying is that because I have an AGI cert (a course designed and instructed by Bob Dunlap, the guy who instructed and designed the course a Lassen College in CA) that I'm a hack and a crappy gunsmith? You don't even know me. Bull crap. I say anyone can learn in whatever method they learn best in. Yes I agree hands on is very important, but it's not the only way. I took the AGI course and used my own firearms as aids while using the course.
As far as cost, tuition may not be hundreds of thousands, but if you have to uproot your family and move across the country to get to one of your beloved schools then the costs sky rocket. Could you afford to uproot your family and move half way across the country with no job, no income and still support your family while going to school? I think not.
There's no competency standard?!?!?!! Who do you think you are? I take great pride in my work and have a very high standard for quality and care of my customers property. I take great offense at people like you crapping all over people like me just because we didn't go to your favorite school. You're the kind of person who would talk crap about someone you've never met in an effort to run them out of business just because they didn't belong to your little club instead of being friends with them and perhaps helping them along.
In my state, gunsmiths aren't even listed in any phone book or on the job listings. No one hires, period. They all work for themselves. There is no school here, if there was I would have gone. But since I couldn't afford to move my family (not that I want to) I'm not going to attend some lengthy college course.
I chose the method of learning that worked for my circumstance. Do I have the customer flooding my door, no, I've only been in business for a couple years and it's a hard profession to break into if you're not already financially setup and have great places to work (nonexistent here in WA). But I can tell you I haven't had a single customer complain and have gotten rave reviews from most.
As far as experience, that's attained the same way it is anywhere, by doing it. If you work for someone else as a beginner, you're putting their rep on the line if you screw up. I never said I know every thing, or that I was a master at this, but very few are. Every time I come across something new I haven't seen before, or haven't done before, I scour everything I can to learn it before doing it to a customers firearm. Thankfully I have extensive experience in fabrication, metals and composites. The more I get to work on firearms the better I'll get.
As far as comparing to auto maintenance. I would rather take my truck to a shade tree mechanic who learned by doing than some snooty grad that just got his ears wet and has no mechanical skill.