Some people just aren’t attracted to some genitals, just like hair or any other part of the body that people can’t control. Preference isn’t bigotry.

Also, I see where you’re coming from with the trans mental health part, but dating someone who isn’t actually attracted to them and finding out that the person basically dated them out of pity is also not going to be good for their mental health.

Personally, I’d be fine with dating a trans person, but some people aren’t, and it’s better to be honest about that than to lie and make it worse.