It’s like a game of pretend. Everyone has to pretend men can be women and women can be men, and both can be neither, and that this is all hugely important. And that men are the centre of the universe, so that if there is another category, it has to be one that identifies that you are not a proper man - obviously, men can be proper women, though, more so than biological women, because men are better at everything.
Mental health issues are growing, not reducing, so it can hardly be argued this is helping anyone. Transexuals are transexuals. They are a different category of their own. Most of the time, they can live as the man or woman they see themselves to be, but not all the time - sometimes, they have to accept they are not the same as people of the opposite sex and have no right whatsoever to interfere with the words and safe spaces of those people. They have a right to acceptance and to be treated with dignity and to be afforded safe spaces too, though.
Society was in a better place when it was allowed to differentiate effectively between transexuals, transvestites and perverts with misogynistic fetishes and fantasies. Non-binary is just a load of narcissistic nonsense created as a consequence of insisting that fantasy is more important than reality. You are just a human being, like everyone else, and the vast majority of humans know exactly what sex they were at birth. There is no need to argue against that identity - the problem is the gender stereotyping, not the sex.