You are right that I read rather too much into his comment. I think he would, as you say, disagree with the kind of sexist enslaving scenario I presented. What I was trying to say is that the sort of reasoning he presented: "accept" differences and "use" them (as opposed to, as I advocate, accept them but then largely ignore them in practice to avoid discrimination --- essentially the same as what you say), when brought to its logical conclusion, naturally and unconsciously leads to discrimination. It's just that I phrased it in a way that made me sound too extreme, sorry.