I don't think you get it at all. This has nothing to do with wanting to behave like the other sex, or being treated like the other sex. Nor does it have anything to do with cross-dressing. It has to do with a funamental belief and knowledge that you are in the wrong body, created by having a brain structure and chemistry closer to the oppostite biological gender than to your own biological gender. It's not even about wanting to be a woman, it's knowing that you are one, but outwardly appear top be male.
Someone's gender is, for most transgender persons anyway, imprinted in every cell of their body. Perhaps there are people who 'know' that they are 'really' a lizard or the master of the universe. Perhaps they are having a really hard time to accept that their real life conditions don't match up with that conviction. Or, more commonly, just someone who believes that he or she is really, really ugly, and who are finding it extremely difficult to accept that they look the way they do.
Why? Let's say that there was a genetic female who for some medical reason had a huge boost in testosterone during puberty and so instead of developing like a teenage girl and getting breasts and curves, she ended up with a flat chest that grew hair, as did her chin. Would you be agreeable to her having correctional surgery to become feminine?
Of course. And I'm not saying transgender persons should be banned from operation or hormone treatment either. But they, and this hypothetical person, will fundamentally have to learn to accept that they were given a physical lot in life which is not what they really wanted, and although there are some things they might do to mitigate it, there are limitations to what is possible and in the end they must learn to accept and like themselves for what they are in the physical world that we live in.
Try and imagine what it would be like if you were magically transformed into a pengiun. Now all the other pengiuns would treat you as one of them, but inside you would know that you weren't a penguin, that instead of being a penguin you were a human. Would you want to be changed back to being a human so others would see you as human, or would you want it because that is what you are?
It is not possible to operate a penguin to become even remotely like a human. So it does not matter what I would
want. I would still have to learn how to live life with the body I had been equipped with. Maybe I would not succeed and I would always be miserable. But it would still be my only hope.
And again it's not about how others treat you. If it was most TG's would stay their birth sex because changing often means getting treated like crap. It's about becoming the person that you honestly and truly are inside.
Sorry, I don't believe in this 'truly' bit. You truly are what you are. You may not like it. You might have preferred something else. Perhaps you can do
something. If you're very fat and you hate your body because of that, you might be able to lose some weight. But maybe you're simply not able to lose nearly as much as you'd like, no matter how hard you try. In the end, you simply must learn to like yourself as you are, no matter how hard this may seem.
And I do not believe that it does not matter how other people see you. It is patently obvious that a lot of transgender people are very much interested in getting 'confirmation' from others in their new gender roles. And I don't think that's wrong at all. If you don't like your own body, I think it can certainly help you to find someone else who truly does like your body.
Say "learn to live with the fact that your physical body is what it is" is a load of crap too. Trust me on that one, I learn to live with my body every day, and it is incredibly difficult, it's living a lie.
I understand that it can be extremely difficult, I really do. But in the end, I don't think there is any other way.