TBH, I think almost all people who are perceived as women and so experience institutional sexism do err the other way. At least, the story of my career has definitely been a story of realizing in retrospect that those who didn’t appreciate me and whose opinions I was using to try to create a balanced view of my own competencies were largely just wrong, and often wrong with a subconscious sexist agenda (generally along the lines of “she’d CAN’T be as good at me in an area I care about, because she’s a she”).... modulo a few temporary periods of depression-based low performance on my part.

I think this is probably a place where gender differentiation is good: institutional sexism appears to be a very strong protector against unsupported overconfidence and if you’re a person who tends to experience sexism even if you don’t notice it regularly, you probably don’t have to worry about overconfidence; while if you’re a person who isn’t subject to significant institutional sexism, it’s probably a good idea to check in on the potential for overconfidence regularly.