It’s blindingly obvious:
There are sensitive issues at stake. Some female-attracted trans women talk openly about the issues with finding a partner after transition: how it can remove you from the dating pool of many straight women, but it doesn’t mean that same-sex attracted women start finding you attractive.
It’s at the heart of the very definitions of heteroesexuality and lesbianity. Much of the correct reaction to trans issues is just to be polite – folk are as folk are. But sexual attraction is to sex, not gender. So that’s an area where there are clearly going to be problems.