It shouldn't but it does (Score 1)

I'm 17

I work on a farm, driving tractor and doing mechanic's work on the tractors.
I know very well what I'm doing, still if my boss is having a problem with another guy around, they'll stand there and say 'yep.. maybe if we try' and I could tell them some way to fix it 5 times before they actually trust me enough to try it.

Maybe you could say: once you are old enough to be trusted, pay attention to the younger people once in a while.