Being trans clearly doesn’t mean that you are attracted to your own sex by default though, does it? And by ‘same sex/same gender’ which do you mean? The sex they were born as or the gender they identify with now?
There are many trans people who identify as women who still want to fuck biological women with their penises and identify as lesbian. Some might say this is a delusion stemming possibly from ASD, mental illness, a personality disorder or just plain old fetishism. Those people risk being deleted on MN and even cautioned by the police for a hate crime for persisting with those views.
Personally I am not aware of any trans ‘men’ who encourage men to fuck them in their vaginas while calling themselves (with a straight face) gay men. Perhaps they exist but I doubt there are many. I imagine the vast, vast majority of trans ‘men’ identified as Tomboys as children and butch lesbians as adults before they identified as (probably non binary) men wanting to continue sleeping with women who are probably lesbians. As a rule most straight women prefer their blokes to have a real, working penis.
Contrast that with many trans people who identify as women. Are they all the camp, naturally effeminate boys we always knew instinctively were probably gay? Devoid of the typical interests and characteristics of boys and men, hanging out with the girls and displaying very feminised body language and voice patterns? No. They are not. Most of those men are still just gay men. Some are now trans, or have gone all Sam Smith and are defining themselves as gender non binary, but are still clearly gay men.
The trans ‘women’ who sleep with men probably always wanted to sleep with men. They were probably gay men. Their new ‘non binary gender’ status doesn’t suddenly extend to wanting to sleep with the opposite biological sex.
However, it’s clear that a very visible proportion of trans ‘women’ have all the natural femininity and delicacy of your average bricklayer or rugby prop and probably didn’t show any signs of gender fluidity or confusion at school. They were not obviously women in waiting. They were not gay. And now that they are trans, they do not suddenly wish to sleep with biological men. They want biological women. They always have done. They’ve gone from defining themselves as a straight man to a lesbian woman. Somewhat unsurprisingly, lesbians are. Or particularly attracted to them and straight women aren’t either. And they are very, very angry about that.