Young people are not more shallow or less intellectual than older people.

And as you get older yourself, you will start to cherish that fire and liveliness young people have and old people don't.

But really, you are only interested in people triple your age because there has been some person your age too lazy to capitalize an 'I'. I mean, that is laziness or lack of 'OCD'. Not lack of intelligence.

I have yet to find an old person interested in the math I work on. The only people interested are my peers and their interest is purely professional. People generally aren't interested in math, unless they need it. Even if they know lot's of math themselves.