Agreed that the TRAs are the primary pushers for formalizing legislation on the matter. What I'm not clear on is whether that is the cause or effect. Like, I'm not sure if they were pushing back against a movement to exclude them (starting around the time that conservatives started pushing against Drag Queens and the like), or if they were motivated by being tired of being marginalized. Either way, I think the best solution remains to push back against legislation in either direction. Lobby to maintain the older status quo, as you say seems like the ideal.
The TRAs started this.
In UK they pushed to change the GRA, including removing all diagnosis requirements completely, requiring no active treatments, and drastically reducing (eliminating?) the waiting period and cost to change legal documents. When females put together a meeting to talk about what the proposal would mean for female rights, and where there might be some problems... a whole lot of males with transgender identities showed up and threatened and harassed the females so much that the meeting had to be cancelled and moved to a secret venue to avoid abuse. It still resulted in at least one elderly female being physically assaulted by a male with a transgender identity
In the US, much of the issues arose out of Obama and Biden executive orders redefining "sex" to include "gender identity" with respect to Title IX, and requiring that all publicly funded schools allow males to participate in female sports if those males say they have "womanly feelings" of some sort. It also required public schools to allow male students to use female bathrooms and showers. It resulted in several very unhappy female students who rose issue with it all... and were over and over again slapped down as being "bigots" for not wanting a fully intact male to be able to look at them while they were naked. Including a judge declaring that female students have no right to visual privacy while in the showers - thus effectively legalizing voyeurism.
Those were some of the flashpoints. But bear in mind that it's been steadily creeping in for about 25 years now, with males getting more and more blatant about overriding and dismissing female boundaries.
The conservative aspect of this is a new thing. Up until quite recently (last 5 years or so?), it's been almost entirely left-leaning and liberal females (and some male allies) who have been objecting and raising the alarm about this. And I'm fully worn out by the fact that every ◊◊◊◊◊◊◊ time a conservative male decides to latch themselves onto this topic, a pile of ◊◊◊◊◊◊◊◊ come out of the woodworks saying "gee, where have all the feminists been on this?" We've been here the entire time, they just don't bother to listen to females.
And just to clarify where my head is at, I very viscerally want the boys in the boys room. But as I talk to women, more seem to say it's not that big a deal to them as I would have thought. They view it largely the way I view a woman using the men's room (in some bars I used to hang out in, it was pretty common). It's a little weird and my guard is up while they are in there, but we tolerate that kind of stuff sometimes.
I suspect you're talking to a narrow range of females, and you're giving significantly greater weight to opinions you agree with than those you don't. ISF doesn't have a large number of female posters to begin with... but a significant majority of females here do NOT want males in female spaces including restrooms. I don't know if you are just unable to process our statements, seeing as you've decided we're all evil bigots who only want to keep males out of female spaces for "bad reasons", or if you've somehow decided we're not females at all. Either way... You just keep ignoring the growing data that demonstrates that views have shifted over the last decade, and that a majority of females now oppose letting males use female spaces. I know it's been shared with you repeatedly - one survey from the UK, one from the US.
I'm also curious how you're framing your question. For example, if you ask "Hey, do you freak out and get hysterical if a male wanders into the female restroom, like sometimes happens if it's busy or they're drunk?" you're going to get an entirely different answer than if you ask "Hey, are you copacetic with any male at all having the right to use female restrooms, as long as they make an out-loud claim of having a womanly gender identity regardless of whether they come even remotely close to passing?"