It's not clear to me how the "tracks" were significantly different in, say, the past 80 years, at least in America. Compulsory schooling has been a thing for a long time. Getting an after school job delivering newspapers so you have a little spending money is not exactly a clever endeavor, and it's not clear to me you learn more life skills than you do having to manage homework (for example).
Get married to someone of the opposite gender, go to church every sunday, have kids. Work a job with a pension for 30 years, retire with a gold watch. (or the blue collar equivalent). Those are tracks.
I don't disagree with the premise that kids are more coddled today than they used to be, but the "tracks" metaphor is, if anything, less valid now than ever. There is more choice, and less stability, as far as I can tell.