Dittany, your posts make me uncomfortable, because in some sense I can see what you're trying to get at. If like me, you don't believe in a gendered society, or that gender fundamentally has very much to do with what you're like as a human being, then wanting to change genders has very little meaning to me.
I can't understand looking at my body, why it would be so important to change it in such a fundamental way. I have what has been termed a very 'masculine' mind (note the '' marks) but I don't think of it like that, I think of it as being my mind. It must be feminine in a sense, because it's mine and I'm female.
However my understanding it is not the issue here. The issue is the substantially larger number of people who are hung up on gender to such an extent that they feel they need to change bodies to match minds and bodies up.
I firmly believe that one of the causes of this is blatantly obvious. A rigidly gendered society creates conflict amongst people who don't fit in. If we lived in the non-gendered society I mentioned earlier, then we wouldn't have trans people because gender wouldn't be an issue.
However we don't live in that society. We live in one where trans folks are derided as in your posts, when all they are trying to do is reconcile their minds with a body that doesn't match what they feel. I have several trans friends and the implications of your posts would hurt them, but not surprise them. It's assumptions like that, that they live with every day, and it's ridicule that they've had to learn to accept. It doesn't stop them from trying their best, and maybe it's time you thought along the lines of 'they're human. For whatever reason they want to be a different sex. Rather than making their lives harder than they already are, I'll just live with the idea that someone is different from me... and it doesn't make them wrong.'