I don't think you read danr's logic correctly, but I could be wrong.

I interpreted it as "The reason women want to be treated differently [from how they are NOW] is that the world is a sexist place." Not, "The reason women want to be treated differently [from MEN] is that the world is a sexist place."

Either you are wrong or danr shifted goalposts, then. lohengramm's point pretty clearly is talking about women being treated differently from men, not women being treated differently from how they are now.

Affirmative action != Sexism

Affirmative action is exactly sexism (or racism when applied to race); it is just claimed to be justified.

Even those who advocate for affirmative action generally do not deny this. You are behind the times.