Don't give up on the younger generation just yet, there are a few running YouTube channels based on wrenching. GoldGuy is worth checking out.

Exceptions exist.
Just like once in a while I see a coupla kids riding bicycles. It's nothing like thirty or forty years ago.
Manufacturers have been building more and more dependable cars. More and more complicated to repair. Requiring electronic readers and tools not found in grandpa's toolbox. The times of a seventeen year old kid needing to carry a set of points in the glove box are over. The days of slapping a quick tune up on it in the garage are over. Now it's cleaning up idle air passages and map sensors instead of new points, condenser, cap ,rotor, wires and plugs, check the timing, blah blah blah,,
Can't even adjust the idle speed on the Rogue. But, the throttle cable is good forever... since it don't Got one.
I don't remember a crankshaft position sensor on my 62 Chevrolet, or oxygen sensors.
If I was the same inquisitive kid today I don't know if I would have been so drawn to fixing my own cars. I know how few opportunities I would have had to
Hold the Light
for my step dad.

I guess the boys are still boys as long as schools can scrape up enough of them to field the teams.
Not to say I'm not concerned about the youts in America, I am.