Let's not forget class privilege (this may sound like a heresy, but difference in income between rich and poor people is probably even greater than between men and women). If you are a programmer born in a working-class family, it may be difficult for your parents to teach you proper interviewing and negotiation skills.
Indeed. Not just "difficult to teach," but such skills are simply not among those generally valued among the middle and working classes, in my experience (having grown up in them). This is part of why I speak so against them: to me, the idea that they're just "something everyone should have" seems so alien, extravert-centric, and elitist.
