expectations.

well, it feels good to be smarter, stronger or better than anyone else at a particular thing.
however, it has its drawback.

because you have more skills or knowledge, people will have expected more of you.
"Oh, he's good at soccer. He will play very well then in the match."
even though they are better than you, it does not mean that they won't have any mistakes or bad days, in which they may perform badly.

as people expected more of you, you will feel pressurized.
and most of the time, pressure results in bad performance.
the worst case is: you won't do well, and people starts criticizing.
but if you did well, people would go: "ahhh, it's normal of them to be as amazing as that."

the criticism given might be just a joke, but the criticized people might take it to their heart.
it's not the critics fault though.
some or most of better person do have their own expectations of themselves.
and self-expectation (especially if it's in excessive) causes them to take jokes seriously.

I am not saying that having self-expectation is bad.
but everything that is lacking or in excessive is not good.
you have to know your own limits and capabilities.