The vast majority of the transgender movement is a way to control and compartmentalise people into narrow categories rather than to accept that people are individuals. Also, as PPs have said, sex is a biological fact, which cannot be changed, whereas gender is a personal/social preference of behaviour.
Grayson Perry and Eddie Izzard are men who often like to dress up and present in a style that's more stereotypically female, but neither of them claim to BE female, which is as it should be: their male sex cannot be changed, but the dresses and makeup that they choose to wear are just neutral stuff with nothing preventing their being worn by a female or a male.
I am a white British person who really likes curry, but it isn't an either-or choice that I have to make to stop eating curry or to somehow claim to have transformed into an Asian person - as, whilst curry is traditionally considered to be an Asian food, it's just neutral food which can be enjoyed by anybody of any race.
Being female or male, black, Asian or white is just a biological fact and none of them is better or worse than another. In this country (and most western nations), we have equal opportunities of choice and have long left behind the dismal days of 'girls can't do that' or 'that's for white people only' when it comes to personal choices and how you want to live your life.
Stop trying to pigeonhole people and making them feel they need to change WHO THEY ARE because of WHAT THEY CHOOSE TO DO.