Impostoritis: A Lifelong, but Treatable, Condition
slate.com
slate.com
Impostor syndrome applies to everyone who still lacks close friends in a particular social occasion. So it's very common on all steam folks since most have social anxiety, hence take a long time to make close friends.
There's also a bit of a vicious feedback loop; often people are unwilling to admit that they don't know something because they don't want to appear weak. But until they admit it, they'll always be deficient in that subject.
All the smart people, whatever the gender, are probably applying elsewhere.