I believe it was Einstein that said “don’t judge a fish by its ability to ride a bicycle”, I’m probably misquoting somewhat.

Anyway, I think what the person you are replying to was trying to say that everyone has things that they are stupid at.

For instance, I can’t dance other than either specifically spelled out instructions like waltz or like an epileptic on crack cocaine in a rave.

I have a lot of other things I’m bad at but that’s just the squeakiest wheel to grease.

I honestly feel like these people are trying to say something and don’t have the skill needed to say it.