Transphobic leaves a lot of room for interpretation. Let's take islam as an example... btw, I'm a muslim.
If I'd say something along these lines "It's absurd that we live in a society where people feel the urge to tell me to greet them with 'sallam alleykum'".
Would that be islamophobic?
And yes, I agree, If I were to go around and just write these types of comments on every occasion, sure, that'd be a rightful ban.
what's that even supposed to mean? If I talk to someone like I do with everyone else, without changing my tone/or opinion based on whatever race/religion/identity they go by, then I certainly am treating everyone with the same amount of respect.
We've lived for millennia now, and I don't recall a single book where a person of the past was mentioned in addition with their pronoun, in the sense of "____ was a writer/artist/mathematician in the late 1800s who went by they/them"... etc.
We're introducing unnecessary complications into an already complicated society we live in.