It is amazing. Adults worry about their peers. When you look at what professionals want out of their careers, it's "respect of their peers."
Yet they seem to think that this doesn't matter to teenagers.
Now, as a teenager, it's true that 1) your peers are a bunch of idiots, and 2) none or few of these people will be in your life in 5 years, let alone 10.
Those lessons can be hard to sink in, and the adult can be too quick to forget that the teenager has no reason to have internalized them.
1 and 2 also applies to many adults and their peers. I think the main difference is as you stated that teenagers haven't internalized those lessons yet.
Yet they seem to think that this doesn't matter to teenagers.
Now, as a teenager, it's true that 1) your peers are a bunch of idiots, and 2) none or few of these people will be in your life in 5 years, let alone 10.
Those lessons can be hard to sink in, and the adult can be too quick to forget that the teenager has no reason to have internalized them.