It's not 100% accepted within lesbian feminist writing that being a lesbian has an exclusively genetic cause
That was a strategy that worked well for stonewall.
It somebody was 'born this way' they wouldn't be able to help it so it would be cruel not to accept them.
The feminists who disagree with this are broadly also the same feminists who disagree the cause for being Trans is exclusively biology.
So I think that's at least consistent.
Behaviour is a choice.
You might have same sex attraction but acting on it is a choice just as acting on opposite sex attraction is a choice.
My argument would be that same sex relationships between adults harm nobody so it doesn't matter why they happen and we should be left to get on with it.
It's clearly not a delusion.
I'm in bed with a woman.
That is observable.
Unless you redefine what a woman is...
I think the 'born this way' strategy worked for stonewall for gay people so they've just tried to apply it to Trans people.
I think it would be better to talk to a range of Trans people and truly represent a variety of theories and understandings of what makes somebody Trans.
But I also think stonewall should either fight for all gender nonconforming people or none. Either they are an organization who represents people in same sex relationships and people who are gender non conforming, or just the former.
It's hard being gender non conforming and either being told you're Trans in denial or that you don't go through any issues because of it.