My issues with this are it's ageist and unequal, teenagers are people too. Many teenagers work harder and are smarter then many adults. It glosses over the fact that some teenagers sadly have to support children and adult parents as well. Symbolically it tells teenagers they aren't worth as much as adults. It could reduce age diversity in some jobs which can be important.

I never understood the argument that middle class teenagers either should be given opportunities, or the opposite that they should leave those opportunities to adults. Society shouldn't be picking and choosing who gets what opportunities based on things as broad as age.