I mean, is it discriminative in the purest sense of the word? Yes. But people discriminate against people as intimate partners for way shallower reasons than their gender identity and it’s considered acceptable. Think height, weight, muscle mass, sizes of various body parts. Is it discriminatory? Technically. But it’s not a hate crime any more than the other reasons I listed above are in the context of choosing an intimate partner.

Not to mention one big factor that’s important to some people: the ability to have children. As of when I posted this comment, the only trans people who can have children are the ones born with a female reproductive system who haven’t had it surgically removed. This does not make any trans people less valuable as people (thinking that would be transphobic), but it does make them incompatible as intimate partners for people who do wish to have children. At least at the time this comment was posted. I’d love for this comment to be invalidated by new medical breakthroughs at some point in the future!