I am not saying, as you think I've said, that transpersons' gender identities and expressions are not genuine.
The word "emulate" carries a connotation that the emulating person is not being genuine.
Your whole "best effort" paragraph does little to make this sound any better. If a young girl from birth were raised as if a boy, and later decided to shurk this rearing and become a woman, would she be putting on her "best effort" to "emulate" a female, because she doesn't share a girlhood?
For your argument to work, it would have to apply equally well to children who have (abusively) been forced to conform to the opposite gender. That physiological conditions are not relevant, but rather the life experiences of those individuals. And what of children who transition early in life? Is this child emulating being a female as well? Even though she has lived full-time as a female since the 5th grade, and was afforded the courtesy of being gender-non-conformant even before that?
That is not a condemnation, or indictment, or any sort of projected negativity, but an acknowledgement of demonstrable developmental difference.
It would be folly for one to argue that trans people experience the same upbringing and development as cis people of the gender with which the trans person identifies. However, that does not invalidate the genuine nature of the trans person's gender, and certainly does not warrant the term "emulate". If a transperson is acting genuinely and honestly, then there is no "emulation" going on, they are being an honest representation of a woman, or man.
A transwoman is a woman, a transman is a man. They are not "emulating" their gender. Do they share identical developmental histories? No, but then gay people experience different developmental histories as well, sometimes gender non-conforming even. There is an incredible amount of variation in the world, and singling out one group of people and accusing them of "emulation" of their behaviors is offensive and wrong.
You claim to have trans history, yet you clearly don't show any obvious deference towards the feelings of those people. Black people are not immune to racism against blacks, and women are not immune to sexism against women, and homosexuals? All one need do is point to the all of the anti-gay politicians who turn out to be homosexual to demonstrate that homophobia is not limited to the heterosexuals.
Do transpeople have different histories from cispeople? Yes, they do. But there is no reason why that should depict them as less than genuine, especially considering how vast the differences in development of cisgendered people that can occur without even considering the transgendered.
(BTW, it was abundantly clear that your sexuality included a fetish for MTFs. I just didn't touch on it, because it's entirely irrelevant.)