It's how the world is. A woman in real world can put on just about any clothes and no one will laugh at her for wearing "a mans clothes". A man can put on some of the clothes that are considered woman-only and he'll be mocked to high heaven, even if that piece is a variation on pants which historically came about as male clothing originally.

It is how it is. There is no such thing as male-only clothing in real life, so any sort of male-only clothing in game would feel forced. There is a lot of female-only clothing in real life, so obviously there will be the same in game. The only difference is that people that want to wear it anyway in real life usually won't, because they still care about their opinion enough to not, while in game they wouldn't, so it must be locked out artificially to prevent half of the populace using drag queen glamour for kicks and giggles.