yes a trans person is biologically their birth sex. ( did anyone dispute that?)
What they did was to play a game of semantics. You don't generally hear trans people talking about biological sex. Instead, they talk about "gender". It's a neat trick, but it is rendered irrelevant when you use the words "biological sex". I don't care about gender designation, and I don't accept it's a synonym of "sex". But you can easily find many arguments that gender is the thing, and gender is a term that is fluid.
But it isn't that hard to understand some people feel they don't belong in their birth gender.
I applaud you, because for me it IS difficult. What is it they're not belonging to - social expectation of what a man is? Males come in all shapes and sizes, and with different ideas and actions. But hating your *******s? I can't relate to that, and I don't fully understand it.
I see it as becoming, as far as is medically/ surgically/ socially possible the opposite gender to that you were born as.
And that, is weird within itself. As I have said, I have enjoyed the female form for all of my life (well, you know, let's assume "life" starts at puberty.) Women are incredible, beautiful, and as a man, a little strange. I know what I like, but that may not be what women think of themselves (if that makes sense). I'm old fashioned.
But to be a woman, and believe you're a man....... that's not something I understand. I can hear the statements, I can appreciate their claims, but I can't get away from - a trans man isn't a man. I don't have any issue with a woman wanting to live as a man, but to insist that *I* should consider them a male, that's problematic. When it comes to trans women (here we go, entering the danger zone) as a heterosexual male, if I found out someone I was dating was Trans..... that would be a huge problem. I would not be happy finding a woman I was dating was born a male. It's independent of how they look.
So a question to you. If you were intimate with someone and they portrayed themselves as one sex, but it turned out they were born another sex, would that matter to you? Would it matter if you found out before, or after, intimacy?
I'm not seeing how Martina Adam relates to transgender.
Well, it's all a matter of being what you declare, rather than who you born as. Martina declares herself as being a black woman. However, she was born white, and she only presents as black due to a drug regime. At what point does psychology trump biology?
Perhaps that is the problem - you are basing your view on extreme examples portrayed in the media and not on ordinary people who have transitioned without fanfare or doing the attention seeking stuff some posters seem to think is represntative of all transgender people.
I know transgendered people are relatively rare - but am surprised you have not met any at all in real life. Or perhaps you have and didn't realise it, who knows.
Okay, so I have one instance when I came across it. I was working at Lloyds of London, a financial institution. One person transitioned. He (a trans woman) worked at the other end of the building. I never saw or met them. I had no interaction. But - it would come up in conversation with others. Such as "have you seen X, they've come in as a woman!" Now, the person was brave to suddenly come in that way. On the other hand, how do you expect others to react?