What sometimes tends to happen is that people who are extremely skilled in one area can fool themselves into thinking that they are also skilled in some other a

What sometimes tends to happen is that people who are extremely skilled in one area can fool themselves into thinking that they are also skilled in some other area. Whether that's actually true or not is kind of random, but frequently enough they're just fooling themselves. It's a kind of inspired overconfidence, and not listening to doubters is a way to achieve that. The actual skills and intuitions they have may simply not have carried over, and it is their fault if they managed to fool themselves like that.