Bit long but so many thing. DadJoke The technical word for your 'like' is probably gynephillic though a female on synthetic testosterone, even without surgery (of any identity - not every dysphoric female on T identifies as trans man or even as trans), does often have changes to the vulva that not every gynephillic person likes - smell, texture, size, and so on. I personally don't mind but I know others who find the changes offputting. Neovaginas/vulvas are an entirely different thing particularly on a male (some females with certain DSDs have them as well).
Even saying you 'like vulva' can be turned complicated but for 95%+ people just saying you're a straight man will be far more understandable without your defining people you're attracted to by their genitals when there are dozens of other sex characteristics that play quite a big role in human attraction before getting seeing genitals. That's why most of us can tell who we're attracted to with their clothes on and using hormones.
Also, as a dysphoric person, let me say how much I hate when people think calling me a person with a vulva is somehow better for us. I mean, seriously, it's dehumanizing in any case but using it for people who are distressed by our sexed characteristics seems a particular asshole move. Like, great, thanks for seeing and defining me by one of things about myself I often hate and try to ignore. I'd far rather just be called female if my sex is relevant. Female and male have a meaning for millions of species of animals and plants, they can keep working for humans. There are times I don't like and even despise people can see it, but that doesn't change that anymore than my hating that people being able to hear I have an American accent changes my nationality or how I talk.
Trans issues are not intrinsically a feminist issue. Even under intersectionality, not everything can be shoehorned in. Feminism, in the dozens of branches which disagree on many of the details and solutions, is about focusing and resolving the issues of those who are female regardless of their gender identity. Trans women and other dysphoric males have many important issues to deal with, but they aren't feminist issues. They're trans/dysphoria issues which deserve attention in their own right. Some people focus on one or the other or on other things. Few people can focus on everything. This idea that we can make every issue a feminist issue and push feminists to deal and talk on it is unhelpful, I think.
Now, some trans issues are also feminist issues. The issue with the sharp rise of female kids being referred to gender clinics, the damage encouraging binders is having on female bodies, the lack of research of testosterone on the female body, the issue with trans men who register at their doctor's as male not getting appropriate invited to appropriate cancer screenings because the computers don't yet have space for both sex and gender identity, questioning how do we work with violence stats if we register them by gender identity and not sex... Some people think that's silly but I was discussing female-perpetrated rape recently, something I am a survivor of, and I was asked if my stats included trans women. I can't answer that because I don't collect data but governments and organizations don't usually collect both gender identity and sex information so it's possible. It's hard enough to get people to take female rapists seriously (see what happened with the recent machete rapist case, so many people still saying "you can't rape the willing" when she had a machete) without now having this as another barrier (and I'm using this both because it's personally important to me and because it's one of the few I can think of where trans people are visibly falsely blamed by the public in a way I can give evidence of).
If you post unrelated stuff there to 'debate'/rile up people, YABU. That's what AIBU and chat and other places are for. Find something relevant, there are plenty of them that are reasonable for that section.
And really, most of us can treat people as individuals and treat trans and other dysphoric people respectfully and want at the class/public/medical/legal level want female/male/lesbian/gay to have specific meanings so we can use the words to communicate - that's their purpose. If we use 'includes everyone who wants to' definitions, it mucks things up. That's why I tend to use dysphoric rather than trans most of the time since Stonewall UK decided crossdressers and similar were under the trans umbrella, I want to be clear I'm referring to people with gender dysphoria regardless of how we identify as to cope with it (also, not all types of gender dysphoria are innate. There are decades of research on the connection between PTSD and gender dysphoria, many of us diagnosed pre '00 (when dysphoria because it's own diagnosis rather than a symptom of several things) ended up with a PTSD diagnosis. I'm one of them. I may have a genetic predisposition, but I was not born dysphoric and as, by the US largest survey, there is strong evidence that most trans-identified people are survivors of child abuse with a horrifying 50% surviving child sex abuse, so ignoring the role trauma plays in this is to ignore an essential medical need to consider for our communities. Acknowledging that some/many/all of us aren't born this way doesn't make any part of it less valid. We can accept some people are trans even knowing all that).