If I actually believed men and women were the same, as a man who has interacted mostly with men, it would almost exclusively change my beliefs about women (I would think women were secretly just like I believe men to be, since that is the simplest way to explain my observations). Its not clear why I would believe such a thing, but if I thought pretending there was no difference was a good idea and if I really wanted to pretend vigorously, I would basically be "treating everyone as if they were male." If I were then to stop pretending, I would only change my behavior towards women.

I don't think this is a good position, but it is not inconsistent (its also what some people imprecisely purport to do and ask others to do).