Well for one thing, right now there are more restrictions on men's wear than woman's; there are plenty of crossdressing women, but you simply don't notice them. A woman can wear men's clothing with no one ever noticing at all. The opposite is not true. AFA mtf TS, that again is a reflection on what is currently 'allowed' by our society as well. A woman can be a lumberjack, plumber, soldier, cop, etc., in fact, society has made many exceptions in what is required for lots of professions where physical strength used to prevent women from entering those jobs. However, you don't see much of the reverse, I suppose mostly because of the stigma connected. Men are still subject to ridicule should we want to be a nurse, hairdresser, secretary, flight attendant, server with any all female staff, etc.. While it's still pretty common for men to poke fun at other guys in those professions, you don't hear any jokes about women in men's professions. It's because a man wanting to take a traditionally female place in society is still looked at as a step down in status, whereas a woman doing the opposite is considered taking a step up.
Actually, that's not quite right. While we can't determine the reasons why ALL of us crossdress, for some, it's pretty obvious. Others, not so much. The big stumbling block is trying to define everyone with one stroke of the brush. This is primarily because what we do is considered by many to be a disease, and modern medicine always tries to narrow down the disease cause into one, single thing. However, what it is, is behavior. And you can't determine a behavior as the result of one, single cause. In fact, I'm still surprised that anyone here still posts questions about this. Maybe the search function still doesn't work?