You can think of it that way (that these "teen jobs" are good at raising your kids).
Assuming that you are at the choice between telling your kids they have to borrow student loans to finish school on their own, vs they have to work part time to pay off school while they are attending, assuming they are putting in the same effort, strictly financially speaking, they are probably better off finishing school early instead of slightly later with a part time job. Maybe they can take 4 more units of credits during college per semester and graduate in 3.5 years (if they attend summer classes) instead of graduate in 4.5 years (if they work part time with teen jobs).
I've taken school jobs (IT help desk) during 1st and 2nd year at college then realize the math doesn't work out, and I was already paid for by my parents. I ended up taking more classes and do internship (helps you find your first job afterward) later instead.
I will say this, the people who took part time job because they have to, have no choice, and if they have a choice they probably would finish school earlier with less student loans and start earning sooner. If they have no concern about this because their parents pay for the schools or they earned enough from scholarship or grants, great for them. It is really a luxury that not everyone can afford to do (just like study aboard or other "international travel" people do during college age), yes, working part time at lowish paying job while you are accumulating debt is expensive, and it typically never work out positive financially speaking.
The same goes for "moving out of parents' basement" when you go to college. Many these days go to community college and nearby public colleges for 4 year degrees instead of moving out. I'd say going to a private university and moving out is also a luxury that rarely make financial sense unless it is a top university and you are going into a high paying major (like engineering, not liberal art or communication).
Based on the new grads I know at my work, I can say the young people today are much more financially literate than the young people at my generation, most likely because they are much more in debt, and unlike my generation they don't get as much grants, scholarships, and tuitions / housing cost / etc are way higher today than back then.