The stereotype for this kind of self-narrowing is math/tech people avoiding humanities. That certainly happens, but I see it at least as often in the other direction: people avoiding anything that smells like STEM, telling themselves they can’t, building a whole identity around it. It comes out as this weird kind of shame/pride mix — “I’m not a math person” etc — which tends to hide some kind of earlier trauma: bad teacher, bad curriculum, gender role policing, who knows.