Hi, Erikah, nice to see you/read you.
He or she probably needed to make that boast to someone to feel complete. It's not something that can affect me at all. We are all different and we all have different abilities too. Nor would I question his or her's .
When I see that on social media, I don't judge, I just wish the person doing that would find something to fill themselves with, because they are usually empty people.