Aren't there some junior mechanics or something they could train?
There might be a few out there under shade trees.
But for the most part, current model vehicles are not something people can do much DIY with, unless they have access to the computer that works with the computer that tells you what's wrong. Gone are the days of building your own hot rod--nothing like the 50s and 60s. Vehicles have become ridiculously complex computer liked devices. There are between 30 and 100 computers in a modern car. In earlier ones, that number drops to zero as you go back past the '70s.
Still, I have met large numbers of people who don't know how to check their oil, transmission fluid, etc. and some suffer major malfunctions because of that (I teach who I can). It is amazing how many people will just throw up their hands and say it's all too complex and not even want to learn the basics.
The knowledge of auto mechanics I have came from necessity: I couldn't afford to pay someone else to do it, so I bought tools, books, and picked every knowledgeable person's brain I could to fix my own vehicles. Most of my knowledge stops at the year 2000 (some goes beyond that, because of legacy systems), just because that's when my newest vehicle was made.