My argument is you’ve deliberately chosen an unusual categorisation so you can go on to argue that nobody can change category.
Sex, eh?
An unusual categorisation?
What would you say are our society's more usual categories?
- All the people who wore skirts today vs all the people who wore trousers?
- All the people who wore high heels today, vs all the people who didn't?
- All the people who carried a handbag today vs all the people who carried something else?
- All the people who did something classed as 'masculine behaviour' by today's stereotypes, vs all the people who did something classed as 'feminine behaviour'?
- All the tall people vs all the small people?
- All the left handed people vs all the right handed people?
Exactly what 'more usual categories' should have been picked to be helpful to your argument that people can change categories?
To be fair, for 100s of years, anyone of either sex who stepped out of the stereotypes expected of their sex meant eyebrows raised, or much worse.
I felt lucky enough to grow up in a time where this was being challenged, to an extent.
Even though sex is unchangeable, behaviours, dress and expectations started to be less tethered to sex categories.
Now it appears there's a backlash and an attempt to shove us all back into boxes, unless we sign up to the choke-hold of 'gender identity'.