If you won't let a tranny fuck you, you're a bigot and have issues.
A blanket statement of "I don't want to have sex with trans women" comes uncomfortably close to "trans women aren't really women." Yes, it could just be a preference, and it's entirely their choice no matter what, but especially in relation to "cis lesbians who pride themselves on the fact that they would never sleep with a trans woman" it feels probably rooted in transphobia, the attitude of "they're not really women," which becomes a problem when it bleeds over into other parts of their behavior.
I understand everybody has free agency to be sexually attracted to whomever they wish, but the issue is that if you claim that you are attracted to women, and then exclude an entire class of women as potential partners, you probably have some issues to work out with that particular class of women. Perhaps this is a problem with the way we label sexuality as dependent on gender (true for some people) instead of on physical anatomy (also true for other people). See: some gay cis men not being attracted to trans men, cis lebians not being attracted to trans women, etc. When some people say lesbian, the understanding to them is that they are a self-identified women who is attracted to other self-identified women, while to others they are people with vaginas attracted to other people with vaginas. That's why you get some lesbians who will deign to sleep with trans women () and some lesbians who will date trans men.
It's mostly that while it's entirely possible that not wanting to sleep with trans women is just some sort of personal preference, given the amount of transphobic garbage we're fed by our culture and that even super-progressive people have to unlearn, it's probably based in prejudice. (Even more so if post-op trans women are included, since there's little difference between them and cis women, generally.)
At some point a semi-sane individual jumps in to state that people should be free to have sex with the people they would like to have sex with. This upsets a goon who jumps in with a sarcastic reply.
You're right, that totally makes it not shitty and awful to proudly declare that you'd never have sex with a trans woman.
God damn, is it getting that bad? I remember when you could actually debate something before the social justice squad showed up.
I think any reasonable person would understand that men want to have sex with people with working parts. Restructured junk can take years to get a sensation back, though it never comes back fully. Nerves kinda don't like to heal. Sexual attraction means "attracted to sex," meaning those parts are pretty important. You can't randomly decide what mold of flesh you can be aroused by.
Then there's the fact that 90% of transexuals look like men with lipstick.