Look at the bible.
I am not religious so I do not have those biases.
So look at your Drivers license and Passport, and SS card, job applications etc.
They need Gender id, just like so called "race"
Governments need to label people.
Some people are not either male or female and they have real problems with ID's. They have to got to courts to get their ids made.
Most people are used to this so anyone outside of this is an outcast at best.
Not going to change anytime soon, I suspect it will get worse.
We are all ready just a number to the governments and they want national IDs.
Soon there will be World ID's, all of them will have Gender on them either male or female.
Healthy people have a female and a male side but the society makes us surpress the side that does not go with our body gender.
Would be nice if you can get in a box in the morning and decide what gender you will be that day and no one will bat any eye at the change!