@Silly_G You seem to have an academic view on the subject, except that the base of your argumentation is flawed and therefore, your conclusions too.

Fun fact : I was thinking excatly like you until a few weeks ago, but by talking to actual trans people (instead of an external professor), I saw something was amiss, and decided to do some more researchs.

So, you seem to mix up multiple gender terms.

There's usually 3 things we think of when we speak about it.

Gender norms : how a man or a woman "should act" according to society.

Gender expression : how someone expresses his gender. You said it yourself, you're not a bloke, your gender expression doesn't match 100% your gender norm. Different terms.

Gender identity : how you "feel" you are. That's the most important one.

(And then, there's the biological sex, which does not have anything to do with gender.)

When you talk about gender, you seem to forget the most important one, identity, and focus instead on the expression one (and mix it a bit with the norms).

People who don't care about gender identity but expression instead are transvestites. That seems to be what you have in mind when you talk about trans.

On the other hand, trans people do care about gender identity, and that's what makes them trans in the first place.

In a way to express their gender identity, they often (but not always) change their expression, and sometimes even their biological sex, so that other people stop making them feel bad by calling them the opposite of how they feel like they are.

Now, how do they "feel" they are a man or a woman when that's not matching their sex?

Well... That can't be "explained". It's a feeling.

You can try to rationalise a feeling as much as you want, if you never felt it, it will seem alien.

Try to describe anger to someone who can't feel that. It will feel like an invention to them, something that doesn't exist.

They will probably say at one point "Why would you choose to be angry, if it's bad, then?"

You just have to accept that's how they feel and they can't choose it.

Now, I won't say that you did a bad job. I did the same reflexion recently and came to almost the same conclusions!

It's just that it's natural to not know everything, and it's normal to make mistakes because of it.

And now you know more!

(Also, please stop saying transsexual, as gender doesn't have anything to do with sex, and it implies it's like heterosexual or homosexuel, as in a sexual orientation.)