Its actually interesting in that its the pro-trans side of the debate that is OK with using descriptors to describe biologically matched sex/gender people in a different way than themselves, and its the other side of the debate that doesn't want that.
I think most trans people recognize and admit that they are, at the least, physically different from cis people of their claimed gender. And I'm struggling to figure out why JKR or anyone else takes issue with that other than just to make everything a confrontation.
If you think that's what's going on, boy oh boy, do I have some fantastic beachfront property to sell you in central Nevada.
They're not trying to highlight and describe the difference between transgender identified males and females. They're trying to obscure the difference, by redefining all of us as "just slightly different types of women".
Here's a synopsis of the course of events:
Transgender Identified Male (Tim): I identify as a woman. I want to live my life as a woman.
Females (Fem): Okay, you do you. Here's some tips on how to do make up so you can pass better when you're out in public.
Tim Great! And now that I'm a woman, I'm going to use your restrooms too.
Fem: Um... Okay, I guess. I mean, that makes me a bit uncomfortable, because you're still, you know, male and all that. But I guess if you behave yourself and are respectful, I'll pretend like you're not a male and just get on with the business of peeing.
Tim: Fantastic! Now that we've settled that, I'm also going to use your locker rooms and your showers, and I want to be on the female ward in the hospital, and I should be in the female prison too. And I'm definitely going to play sports on the female leagues.
Fem: Hold on, no, that's not okay. It's great that you want to express yourself as if you were a woman, everyone should be able to dress and present however they want to, I'm all for that. But I really don't think that males should be in the women's showers - you've got a penis, after all, and that makes me and all of the females I know really, really, really uncomfortable and we feel intimidated and exposed. I think we need some alternative option for you.
Tim: But it says "Women's Locker Room" and it's called "Women's Prison" and "Women's Sport" - obviously that's where I belong, I'm a woman!
Fem: Well... you're not really a woman, you're a transwoman. And that's a fine thing to be, no judgement on that! But you're not a real woman - under the hood you're still a man. I mean, you've got a dick and some dangly balls! And all those spaces are divided on the basis of sex, not gender identity. That division should still hold.
Tim: No! Transwomen ARE women. We're the same as you - we're women through and through! "Woman" is a word that means gender identity, not sex.
Fem: No, the word "woman" generally means sex, at least the way it's commonly used. You are figuratively a woman, you're not literally a woman. And we can tell that you're not a woman - you're male, and you look like a male, and you move like a male, and you have male parts. In the sense that those spaces are designed, we're talking about sex, not gender identity. Those are female spaces, for females. That's what that sense of the word "woman" means - human females.
Tim: NO! TRANSWOMEN ARE WOMEN, TRANSWOMEN ARE WOMEN! We're the same as you, we should be treated exactly the same as you. It's our right to use women's spaces. In fact, you're a CISwoman! We're both women, just different kinds of women!
Fem: Now I'm getting angry. I'm not a "ciswoman", I'm just a woman - I'm a female human. You're not a female human. You can dress and present however you want, I'm fully supportive of that. But female humans - women - face a lot of discrimination and violence from males. It's important to us that we have spaces that are limited to just our sex. And that means that you don't get to use those spaces - especially not while you have all your dangly bits. Get rid of those and maybe we'll reconsider our stance.
Tim: That's cruel and abusive, it's bullying and bordering on genocide! You can't demand that I cut my dick off, I still use it! I'm a woman because I say I'm a woman. I feel like a woman. Woman is my identity! Who the **** do you think you are to tell me I'm not a woman? I'M A WOMAN!
Fem: Look, this is getting ridiculous. You're a
transwoman. You're not female. And I should be allowed to talk about my experiences as a female human without having to include you in them - you aren't female!
Tim: I AM TOO! I'M A FEMALE BECAUSE I TAKE FEMALE HORMONES! I'M A FEMALE IN ALL THE WAYS THAT ACTUALLY MATTER IN REAL LIFE! YOU'RE JUST A HATEFUL ****... YOU'RE A TERF! YOU DON'T KNOW ANYTHING ABOUT DISCRIMINATION OR ABUSE OR VIOLENCE, YOU'RE A CISWOMAN - YOU'VE NEVER EXPERIENCED ANYTHING LIKE REAL VIOLENCE, NOT LIKE TRANSWOMEN DO, WE'RE THE ONES WHO'VE REALLY GOT IT BAD! IT'S SO BAD WE CAN'T BE EXPECTED TO USE MEN'S SPACES, MEN MIGHT HURT US!
Fem: This is absurd and incredibly insulting! Don't you DARE relegate me to a subset of my own sex class! That's such an incredibly patriarchal and downright misogynistic thing to do! Women have rights too, and one of those is the right to have our own boundaries and not have to be forced to share intimate space with males. Seriously, I'm starting to wonder how sincere you are in "identifying" as a woman - you clearly have no idea at all what it's like for women, you obviously have no compassion or care for actual women.
Tim: YOU'RE JUST A CISWOMAN, YOU'RE CIS-SCUM, YOU'RE A BIGOT AND A TRANSPHOBE! YOU'RE AN EVIL GENOCIDAL RIGHT-WING TERF WHO WANTS TO EXTERMINATE TRANSPEOPLE! TERFS NEED TO BE HOUNDED OUT OF SOCIETY, TERFS SHOULD BE PUNCHED! TERFS SHOULD GET RAPED WITH BARBED-WIRE WRAPPED BASEBALL BATS!
Fem: OKAY THAT'S ENOUGH! I'M DONE WITH THIS. YOU'RE A COMPLETE BELLEND AND YOU CAN **** RIGHT OFF WITH THIS ********.
...
Fem: But yeah, men suck a lot and if you're wearing a dress they might try to rape you. I'll support you getting a third space that you can use safe from other men... just not women's spaces.
...
Tim: I'M BEING GENOCIDED WITH YOUR VIOLENT WORDS! YOU'RE A TERF AND A TRANSPHOBE AND A BIGOT AND EVERYONE WHO'S ON THE RIGHT SIDE OF HISTORY SHOULD HATE YOU!
...
Man New to the Discussion: What they hell is going on? Why are you chicks being so mean to that transwoman? Can't you see she's wearing a dress, she's clearly not a man, men don't wear dresses. Obviously it's women who are out of line. Those chicks really need to learn their place. All non-men should have access to spaces for non-men. Duh.
Woman who hasn't been paying attention: OMG, you're being so mean, why are you being so mean to that poor transwoman! I've been told that sooooo many transwomen get hurt, all the time! They're constantly getting attacked and beat up, it's even worse than it was for gays in the 80s! I know this one transwoman, and she's totally sweet and harmless. We should totally support them. And besides, I don't really use public showers or anything, and I don't even know anyone in jail, so it's probably not a big deal, right?
Fem: <head explodes>