Hello OP, I haven't rtft but I thought I'd give you my two cents.
I come from the starting point that everyone has the right, as far as possible, to live their lives as they see fit. And that society should aim to strike a balance between protecting our citizens and enabling them to live freely. If you become too protectionist you bring about the death of personal liberty, and if you are too liberal you enable people to take advantage of each other.
So personally I don't care all that much what trans people believe. Or what "gc" feminists believe. Both have the right to live freely according to their realities. I mean I know enough about both sides to defend either against accusation of lunacy, or irrationality; because both do make sense, in their own way; and I don't think it's fair to assassinate someone else's worldview so that you don't have to consider how to accommodate it in society - if indeed it can be accommodated.
What I care about is "what will be the outcome if we do this?". Will it be good for women, good for men, good for trans people, bad for women, bad for humanity? In my opinion the super-protectionist attitude of some feminists would go so far in its attempt to protect women that it ends up infantilising them in a way which is not proportionate to the reality of life in 2018 Britain, and curtailing their freedom and liberty in the long run. If you send a message out to society that women are more more weak and vulnerable than is proportionate, society will believe it. And women will too. It will set us back so many years.
I came into this debate when everyone was talking about self-ID legislation (now everyone bangs on about the ideology, but like I say I think that's unnecessary and morally dubious). When thinking, "what will actually happen if self-ID comes in?", I came to the conclusion, "not an awful lot". Trans people have existed in fairly stable numbers for a long time now, and they have - as far as anyone can establish - been using the facilities for their chosen gender for all that time. Hospitals and prisons have found a way to accommodate that, so have refuges, and no woman was scared that the person in the cubicle next to her might have a penis. Literally no measurable bad has come from it.
Could it be exploited by the rare nefarious sex-offender type? Perhaps. Someone out there sufficiently informed and sufficiently motivated could get around almost any system anyone put in place; people are clever. But so are the people around us every day; prison guards can spot a lying criminal. Bouncers can spot a lying criminal. Even swimming pool changing room attendants can spot a lying criminal. Not every time (no-one can spot them every time) but enough that they aren't going to fall for the "I'm a woman today" bullshit.
So again it comes down to protectionism. Protect your citizens because your citizens can't be trusted. Well I'm of the opinion that society is very largely based on trust. There are those who would abuse it, but we are a civilised nation and we have built that on a foundation of personal liberty, tolerance, mutual social trust and respect. I don't want to see that going backwards any time soon.