I find that male people find it harder to understand this (yes, I'm generalising). They haven't lived with the knowledge of sharp limits on things like their fertility, their likely odds in a fight or race with members of the opposite sex and the impact of a baby on their body and subsequent career. To find out that there may be restrictions imposed upon them by their biology is very, very, very difficult for some of them to accept. They've never faced it before.
That's why women who try to state that TWAW like to use a "be kind, be wonderfully inclusive and progressive like me" approach, while men who do it usually show offence and quite astonishing ignorance at the idea that they couldn't become women if they wanted to.
They'll often claim, in essence, that women are just hobbled versions of them, or with added interior incubators that have no significant effect on the rest of their biology. They can't understand that gestation and delivery are complex processes that require extensive physiological differences and they frequently forget about periods altogether. The women know this is bollocks, so to speak, but their Cinderella complex makes them think there's some reward or inherent goodness in pretending it doesn't matter.