While I am the first to agree with that principle, you have applied it incorrectly.
Your views on transgender/transsexual matters are your views, your perception, and yet you claim this perception of yours to be reality.
[color=#000000][b]Your perception, however, contradicts reality- because you insist that a trans woman is a man because she was born with a penis and a trans man is a woman because he was born with a vagina. Gender is not a perception, gender is a reality.[/b][/color]
Example: In reality, you identify as a woman. If anyone else identified you as a man, that would be their perception but not reality. When a trans woman, also in reality, identifies as a woman and yet you identify her as otherwise, that is merely your perception. Your perception is not reality, in this case.
Gender is personal, and not assigned to you or to anyone else by other people or by anatomy. There are more than two genders, in fact. Gender is not binary, at least not always. Even if there were some universal and absolute way to determine what is masculine and what is feminine, which there is not, there are infinite combinations and degrees of masculinity and femininity in each individual. These may not even remain the same throughout a person's entire life.
Your perception cannot determine someone else's real gender for them any more than someone else's perception can determine your real gender for you.
Reality is still reality, even when you do not understand it.
Do you mean GENDER or SEX?
There are TWO SEXES--male and female.
A person's GENDER is seemingly open to whatever they imagine themselves to be. Gender is how you may identify. SEX IS WHAT YOU ARE.
A male who takes female hormones and/or undergoes plastic surgery to be more like a woman is still a male who has undergone various treatments. Likewise a woman who takes male hormones and undergoes various surgeries to look more like a man is still a female. Chromosomes don't lie.
Gender is all about the costume (that means the clothes and shape of our body) we wear in presenting ourselves to the world that we put on when we get dressed in the morning. If a person wants to live their life one way or they other, that's fine with me, but that does not change what sex they are. I am a female (sex) and identify as a woman (gender).
Believe me, I have a two homosexual cousins (gay if political correctness is important to you), a brother/sister pair of second cousins that live together as if they were married, I love them all and I am heteroflexible myself (bisexual if you like), so I harbor no prejudices on the matter.
I am just calling a spade a spade.