That's the primary reason I've been in the automotive schoolteaching business either part or full time since 1970. I grew up around a top-quality independent shop in the 50's, working with oldtime mechanics from the 20's and 30's. Those guys worked on some of the very first cars, and passed along a lot of their knowledge and experience to me. Now it's my turn to keep up the tradition. Other skilled trades, carpentry, for instance, have centuries of skill and knowledge to draw upon, but auto mechanics are relative newcomers to the scene. If some of us oldtimers don't share our experience, it just dies out!
Jerry