There are only two possibilities: you have the seed or you have the egg. This in turn forces your reproductive strategy, which there are two because there are two roles in reproduction. Thus we get two genders, which are simply stereotypes of variations of these two strategies that differ based on culture/civilization.

The reason many religions see deviation from the traditional gender roles as a threat, or as "sin", is because they necessarily mean deviating from the already established reproductive strategies, which threatens the species reproductive success and basically kills the species slowly.

What is going on today with intersectionality is basically elevating gender to the status of self-identity, equating who you are with your reproductive strategy. A very sad bastardization of the human identity. That is why it cannot be criticized, since talking about that specific mind/body disconnect means attacking the individual's identity. Ironically, the ideology itself is the one reducing and simplifying the identities of their followers, otherwise there would be no need to protect them, since no one is really "questioning their humanity" and instead questioning the future of a society that is testing the reproductive strategies given to us by evolution.