There are no sub sets of sex though. There's just male and female. If you include 'things which aren't male', ie women, in the category 'male' it's no longer a meaningful category. In fact it then includes everyone.
This is why we have the new ideology of Gender and Sex where Sex biological but Gender is a wonderful interchangeable spectrum. Conventions such as Male and Female must be changed in case someone finds them difficult to deal with. Hence we have cis:male, cis:female, trans:male, trans:female and more esoteric categories such as non-binary, queer, polygender, genderfluid, pansexual. There is nothing wrong with wanting to use these terms but it's hard (for me at least) to see what the benefits are in using them, and quite why the force behind the ideology is so strong.
To give you an example, on your medical health record, your doctor must now (if allowed by the software) record both your Sex (biological) and your Gender. Gender is used for reporting by central government as much if not more than biological sex. Medically, a doctor doesn't care about your gender, they care about your sex as this will affect what treatments, screening etc might be suitable for you.
The changes are about supporting Trans people, improving their safety and making the world a better place for them to deal with their issues. But it doesn't alter the fact that in 2019, people with gender dysphoria only made up 0.001% of the population in England. 8000 out of 59 million people. This raise questions about how proportionate the Trans inclusivity agenda is.
There are other ethical questions too - for example we don't support people with apotemnophilia (body mutilation disorder) if they want a limb removed, but we do support people with gender dysphoria undergoing cosmetic surgery and taking hormones to drastically alter their bodies, and there are concerns about the age at which people should be allowed these treatments.