Knicknackpaddyflak I am not disagreeing with what you are saying.
What it comes down to though is gender stereotyping. Society makes rules that says what is apparently acceptable for male and what is acceptable for female. From school age it is taught that boys play football, girls play netball; girls have long hair, boys have short hair; girls wear make up and jewellery and boys dont. It is these stereotypes that are being used to define transgender.
It is also a stereotype to say that men are abusive and dominating and women are oppressed, meek and submissive. Of course we sadly live in a male dominated society and fortunately great progress is being made but we have to loose these stereotypes.
Of course statistically men are much more likely to be violent, abusive, voyeuristic, fetishistic and a lot of other things but that doesnt mean you never find women with these characteristics and it doesnt mean all mean are either.
Our solution moving forward is to get rid of stereotypes. Taking out GD/GID as a medical condition you are trans when you go against what is deemed appropriate for your gender (that also being your birth sex) - but if there were no societal definitions segregating what is and is not appropriate by sex then how could you be trans ?