We definitely agree about attractiveness when juxtaposing cis people and trans people. But I'm not talking about (subjective) cosmetic beauty per se. I'm talking about the sexual mechanics of intimacy.

Yes, it is indeed reducing the hypothetical dating pool if a cisgender person excludes potential transgender mates because of the type of sexual intimacy we desire. The same can be said about cisgender lesbians or cisgender hetero men who will only consider mates who identify as female (cis or trans). Or cisgender hetero women and cisgender gay men who will only consider mates who identify as male (cis or trans). Or transgender people of either sex who will only consider dating other trans people (of one or both sexes).

It's an overlapping group of Venn diagrams that will be different for each individual. And I find it to be demeaning when people suggest that what appeals to somebody else sexually is somehow a "choice" on their part, as though people are demanding "special rights" simply for being true to their sexual orientation and/or gender identity.