How very reasonable.
The thing is, @wordler, I have a feeling that where you currently are with all of this is the same place most gender critical feminists were a few years ago.
Most of us, particularly those who are themselves gender non conforming (including many lesbians and bisexuals) are entirely sympathetic to the view that forcing someone to perform the stereotypes associated with their biological sex is regressive and damaging. We are all for the breaking down of arbitrary barriers, and fully support people challenging gender norms. Many gender critical feminists on this forum talk openly about how hot some men can look in skirts and makeup.
We are also broadly liberal, mostly left leaning, and extremely clear about the fact that we believe trans people should be treated with respect and dignity, not be discriminated against, and be allowed to go about their lives peacefully, free from harassment. Most of us have been the victims of harassment (or worse) at some point, and know how awful it is.
So that is the starting point. That's where I was three years ago.
Then I heard people talking about how JK Rowling is an awful transphobic bigot who puts trans people's lives at risk with her dangerous far right rhetoric. And I thought, "Really? JK Rowling? The JK Rowling who wrote a series of books condemning bullying and bigotry? The JK Rowling who prominently tweets about her left of centre political views, is a member of the Labour Party and friends with Gordon and Sarah Brown? The JK Rowling who never met an oppressed minority she didn't want to help and has donated countless millions to worthy causes? That JK Rowling? Are you quite sure?"
So I went on the internet to find out what JK Rowling has actually said about trans issues. Now, to be clear, most of what she has said is about women's rights. Yes, there is a knock on impact on trans issues because she is strongly in favour of women having their own single sex spaces and sports. But it comes from a place of caring about women's rights, not hating trans people. I don't believe she has said anything which indicates that she actually has a problem with trans people. But she has raised awareness of certain issues. And thanks to JK Rowling, I am now very aware of this particular topic.
That's why I am aware that it is almost impossible, in most parts of the UK, for female rape survivors to access single sex rape crisis support, because the providers of these services believe that trans women should have access to ALL women's groups even though they also have their own specific groups for trans people. It's why I'm aware of just how many male athletes are competing in women's sporting categories. It's why I'm aware of the damage caused by puberty blockers, the unscrupulous surgeons advertising on Tiktok that they will remove a 13 year old girl's healthy breasts for $12000, and the regrets of detransitioners. It's why I'm aware of the homophobic views of so-called LGBT organisations including Stonewall. It's why I know about the findings of the Cass Report, the safeguarding failures at the Tavistock clinic, and the fact that Mermaids (the UK's main trans children's charity) helped fast track children as young as 10 onto puberty blockers with the help of a GP who has since been struck off, and until recently had a self confessed paedophile on its board of trustees. It's how I knew all about the male sex offenders who identify as women and get to serve their sentences in women's prisons long before Isla Bryson made the headlines.
So your point of view, entirely reasonable as it is, is where I was about four years ago. But when you scratch the surface and find out what really lies behind "be kind" and "live and let live" and "trans women are women", it would not be surprising if you found yourself as horrified as some of us now are.
Right now you're still in the "we need new terminology and third spaces for trans people" phase. Perhaps go and look on Twitter and read India Willoughby boasting about refusing to use the gender neutral toilets at the airport recently and walking 20 minutes in the wrong direction to find female only ones where India could pee in the presence of women, and maybe you will understand that the only people calling for third spaces are gender critical feminists.