"I wouldn't call you Dr unless in fact you were it doesn't make sense. If I wanted to be referred to as Lord would it be rude for people to say otherwise? of course it wouldn't it is just petty to even get worked up slightly by it. " MrsMan.
But what if I have a doctorate in Philosophy but you are uncomfortable using the term for anyone but a medical doctor? Your discomfort does not negate my referring to myself as Dr Jaybird. If you wanted to create a persona for yourself with the clothes and rigmarole and so on and call yourself Lord, I'll call you the same, its good manners as far as I am concerned. I might privately think you are barking mad, but my manners would preclude me from saying so! And I don't think it is petty. Transgender politics are not petty when you are a campaigner for same, so I don't believe this issue is petty at all.
I think its pretty clear here that the refusal to call someone Miss while they are using a female persona is about a lot more than the actual title. If you wish to call someone Mr when they refer to themselves as Miss, you are of course fully entitled to, but it says a lot more about you than it says about them.