Unfortunately, as basic farm style skills have atrophied in the general population, fewer and fewer people are even interested in learning how to do trades jobs. Schools started two-tracking about the time I got to HS, academic and shop. Shop was for the dummies. My mother had big dreams for me, based on engineering of some type (both my paernts came directly from farm familes) I think being the primary goal. Yeah, well...my math skills meant I'd never be an engineer. My interests leaned more to following the old man's "profession," auto mechanic, aka grease monkey back then.
Instead, I joined the Marines and ended up playing with expensive aircraft with the props on top.
From there it was a straight jump to...yeah, right. After drifitng for a couple years, I went to college, and ended up doing most of my writing work on motorcycles, cars and woodworking, with stops at home building and remodeling, while living in the country.
I don't have a clue as to an answer, but I do know we need top tradespeople in almost all fields. The pay in many is now almost as bad as that for schoolteachers, though, so improvement in skills is less likely.