Oh maybe because its not about thinking, choice or want, its how they were born.
To you it's about how they were born, and apparently you only mean physically. That doesn't matter to me if I'm not physically involved with the person. It seems to vex you. That's what this thread means to me. Why else would you have started it but to express disapproval of boys not being boys and girls not being girls? You also wrote, "
telling me I have to accept what you feel or believe bothers me." This tells me the same thing.
You're not alone in your cognitive dissonance there.
But I believe that you have a duty to be a better man and honor the Golden Rule. Treat others as they'd like to be treated just as you want to be treated as a cis-male, because that's how you feel. Me, too. But what if you were born in a female body and felt exactly the same way - you want to be thought of and treated as a man? If you know how you like to be treated, you know how to treat others that want the same thing.
Ask yourself why it is so difficult for you to do that. Don't you do that with the deformed? They don't want to be gawked at or patronized, and hopefully, when you encounter them, you do neither of those things, even though their appearance might make you want to do both of them. Why? Because you're kind. Because you just don't want to hurt this person. You want to be supportive and enabling if you can. You conceal your natural reaction of aversion. What is the reason to treat the transgendered and gender dysphoric worse than that?
As a mod you should set an example instead of antagonizing
I thought
@ADigitalArtist did set a good example. You didn't like her posting behavior, but I don't believe that it was because she was out of line. You don't like to be thought of as transphobic. And it seems you think that you aren't, probably because you don't feel antipathy for such people.
But that's not the limit of the definition. What you're doing on this thread is expressing your discomfort and disapproval, which is also a manifestation of a kind of bigotry.
I doubt that you like that word, either, but what else does one call the irrational and harmful marginalization and demonization of a class of law abiding people? It's the soft or cold form of bigotry, the one without apparent hatred, but still sees that other class as somehow less human.
Think of the parents who sincerely believe their daughter intellectually inferior because she is female, and in an effort to help her, steers her away from university, where she is bound to be overwhelmed, toward something they feel is more appropriate for her limited ability, like becoming a housewife. There's no malice there, but it is bigotry nevertheless by the definition I just provided.
Being left handed is inherently sinister.
And gauche.