I would even assert that this is not just always applicable to teens. I had some massive realisations as a child, and found my self limited by language actually and full knowledge on the subject, only to find that 15-20 years later, some things i pondered as a child have absolute merit.
I fully agree with you, the only difference i think really between adults and teenagers is experience , just because your older does not mean you can think more clearly than a teenager, it means you have just had some more time to make good and bad choices and some people can think that this for some reason makes them wise. There are a lot of youngsters doing some absolutely incredible things out there today, people have got to stop trying to condition them into their own failings. It was my biggest obstacle, my family, older people telling me this or that will never work, the real world is not like that, you will see when you are older blah blah blah. I am 30 now, i've become so unhappy with my life that i quit work, and i am doing what i should have done years ago. Give them all the middle finger, because I KNEW all along what was best for me, some advice to avoid mistakes is what they need, not to be told they can't, or they don't understand enough about the world. It's nonsense.