I think you’re overthinking all this.Just had an interesting chat with Mrs T about this.
Gender - does it matter?
Well if what I see when I meet someone and they look like a woman, can I assume they are happy to be treated as a woman?
If they aren't, if I say 'she'/'her' what then?
Only fair - they can say to me "'I prefer 'they'" or even "'he'".
Fine, I will remember that, and we move on.
I was an external examiner at a medical school last year. One of the other examiners was clearly born male but presented as female (in hairstyle and dress, but not in stubble, in nose, in jaw or in voice). They used a female name. That was sufficient for our communication. It would have been rude of me to inquire if they had a cock, if they ever had a cock, or if they planned to chop it off. Or indeed what gender they identified as, given that we used names to communicate, not "agent HWT, male, 65 years of almost unblemished heterosexuality" etc. I mean, Christ.
I do appreciate that this is momentous stuff for some, but really. I mean, really? Oh well.