I was referring to owning one. As a student I lied about my age to take a job as a night mechanic. Made more than anyone else in high school and learned a decent skill that would support my family, then and for another 15 yrs. Btw I faked being a mechanic to get in the door all my knowledge came from fixing mom’s car. You get crap for crap wages, period. That part isn’t worth a debate, just the owning one is. Being smart for a mechanic got me into sales, management and beyond. I worked part time in construction for my uncle from age 10. I could get in attacks and crawls easy and he was a fat hvac dude so I worked a lot. Burnt out w the auto industry I’m back in construction, and doing quite well. No college, no night clerk job.
Meanwhile, my boss is 33 year old millionaire because she owns 13 convenience stores. :)
There is money in just about any occupation for those willing to work hard in them and have the aptitude.