The things you and others raise like pressure to have babies, or not to have babies to me aren't necessarily about the biological possession of working uteruses but also about the gender role of women. There are many cis-women who can't have babies. I don't think they are less women because of that, but I think that is the logical conclusion of exclusively considering biology in many cases.
I just find it reductionist and exclusionary to focus on biology to the exclusion of other things. The experience of being a woman may be affected by the ability to have babies but I don't believe it is defined by the ability to have babies.
I think we’re mostly in agreement but slightly talking past each other on this one. For starters there’s two parts to this experience that I’m describing. One is related to biology and the other is related *only* to being socially perceived as female.
The biology one is that at some level you have to worry about what a guy might physically do to or with you, good or bad, and all the consequences and ramifications of that. Some things a guy can do to you that just, say, a bigger girl, is unlikely to do, and some things a bigger girl is incapable of doing.
The social one is the one about expectations and pressures. You get that whether you actually ever turn out to have a functioning baby oven or not. Constantly being told Guys Only Are Interested In You For One Reason, knowing lots of people will never take you as seriously as a guy, watching people call a girl bossy and a boy a little leader, none of that stuff is actually about biology at all. Tied to it, based on it, built on assumptions about it, yes. But the reason it lands on you as an individual girl isn’t actually because of what equipment you possess, it’s because everyone knows you’re a girl. And you know everyone knows you’re a girl. Especially that boy who is looking at you Like That, when you’d really hoped to just be a friend without benefits.
(Part of the benefit of being a tomboy, for a lot of tomboyish girls, is that until/unless you start to grow up and get really obviously shapely... you’re sort of socially allowed to opt out of a LOT of the girl-role perception-field. To put it simply, boys automatically know you will help catch frogs, and most of them won’t kick up any fuss about team picks unless you legitimately suck, and girls won’t try to use any social hierarchy tools on you (good or bad) because everyone knows you are a girl who is not paying attention to the girl rules. But even in the depths of all this you notice that it’s not too bad to be an honorary boy, but a boy wanting to join in on the girl stuff is absolutely crapped on by everyone but the most inclusive girly-girls who just want to dress up anyone. It can make you really uneasy about what’s going on in your society.)
So you see two understandable types of objections to being totally inclusive of trans women. One is about socialization: You did not grow up perceived as a girl so how can you join the club of that shared experience?
This one doesn’t convince me because I can see how obviously different even just growing up girly-girl vs tomboy leaves you. If the experiential grid there is already so diverse I don’t see the problem with including ‘growing up as a boy who could tell their maleness levels were not ringing the proverbial bell.’ (The only thing I’d demand here is that a trans woman make as much effort to understand where other women are coming from, as much as I have to try to understand where a really mothery mom or a really fashioney shopping scene woman is coming from, or where those types have to understand where I am coming from. And conversely, I do expect other women to try to understand where trans women are coming from, and that there is plenty of diversity there too. Women are not a monolithic group; neither are trans women. But it seems to me that there is a similar ‘you will never be taken as seriously as A Man’ sentiment there, that bridges some of that gap.)
The other one is about biology: How can you ask me not to be as wary of you as I am of any man? I am wary because of what a typical man is capable of doing, and you may be capable of doing all of those things. How can you demand that I just have to put up with being wary where I didn’t before? How can you ask female prisoners to accept being locked in with an inmate who can get boners, etc?
Some of these concern me, some don’t. Some concern me but not more than other pressing issues that affect these populations. Overall I think we’ll all find relatively satisfying standards for dealing with all this. No I don’t know what they’re going to be.
But then it quickly starts drilling down into trends and social expectations again: How can I trust you not to do what any man might do, when you’ve been raised expected by everyone to behave in male ways, trying to reinforce your male behaviors? How can you expect me to sit next to you in womens’ abuse support therapy when you are setting off the same alarm bells in my psyche that any man does? Etc.
Again these are things that don’t rise far above the noise of risk assessment for me but I can understand people being worried, and the support group type stuff I honestly don’t know where lines really ought to be drawn to make sure nobody gets left in the cold. Womens’ shelters for example are sometimes not safe places even without any trans women hoping to sleep there. So to me it’s not about adding a risk where none existed but about weighing a risk while already managing perceived and actual safety.
And the sport one is about biology too of course; again I think this one will iron out to reasonable standards eventually. Nobody wants womens’ sport to be handily dominated by trans women, but how much this actually happens is still shaking out. It happens sometimes for sure, and we need more satisfactory remedies for such situations. I’m not denying that an average guy is as strong as a really quite strong woman, for example. So I would not want say, an untransitioned 22 year old trans woman walking away with a professional level womens’ track event. But I’m not convinced that sort of stuff happens enough, or gets generally accepted enough, to say the sky is falling.