Look, kim, can we just leave it?
The whole bloody thread is about this woman not being able to get into her changing room. Yes, it is also about databases and assumptions and all sorts of other things, but to claim it isn't about changing rooms is absurd.
I do think it matters that the assumption belongs to the programmer, not the system. And you did need correcting on that, because your statement - in that post, not in others - was obscuring the fact that sexism here isn't some randomly generated effect, but the result of active decisions made by people. I felt that was important. I don't think it is mansplaining to say so.
I really don't think I am obsessed with 'the T word'. I think trans people - and everyone else, actually - would be better off if we stopped classifying the whole world into two groups based on sex. I have expressed this view many, many times, both to you and in general on here.
I feel really sad that this thread has now been totally derailed away from 'shit example of sexism' to 'kim and her one-woman crusade to tell everyone they are bigots'. I get that life is shit and hard for you and I am sorry about that. But that does not mean that you get claim everything that is not directly about you must be bigotry directed at you.
It isn't. Sometimes, it's just not about you.