RobinMoiraWhite
Well, my experience is that I dont get misgendered when I am seen as well as heard, and I will live with that.
That is amazingly naive from someone who has presumably been around for a few years.
Of course you don't, dear; people are too polite to wish to get into a squabble with you about something which really doesn't matter to them at all. (If it does, they will remove themselves as soon as is practically possible rather than make any comment, for the reasons cited below.) You do need to understand that the only person who cares whether you "pass" or not is you, and rather than bother about it, other people will say nowt. They may also worry lest a male person who was called on not looking like a female one might do a standard male thing and attack them, physically or verbally. It's not all about not being able to tell, nor about being kind; it may just be self-preservation.
Not to mention that if they "misgender" you people risk all sorts of penalties, legal as well as social. A 19-year-old with Aspergers was convicted of "using abusive or insulting words to cause harassment" because he asked aloud whether a police officer was male or female -- the exact words he used were "is it a boy or is it a girl?" He couldn't tell, so having a condition which means that he is not entirely aware of social niceties he asked; asking was a crime. Curfew and a £590 fine. I don't suppose he understood those either, poor chap.
CheeseMmmm
Margaret Thatcher did the voice-training to change her voice after that well-known feminist Clive James described her as sounding like "a cat sliding down a blackboard" because she had the voice associated with being a woman. IE, not deep enough to suit him. (On the other hand, Michelle Obama has quite a deep voice and was attacked for not really being a woman. Go figure.)