Asking for basic rights doesnt mean you assume anything. Its not a zero sum game where trans people having rights means others have less, or that trans people cant have rights because other may not have them either. Thats a very weird way to make it "Us vs Them" when its just a basic ask all around.
Secondary to that is the fact that if you don't agree with what trans people are saying, they exclude you from their spaces and conversations.
This is just JAQing off with more steps. Woe be it that the people whose mere existance is met with raw hostility dont put up with yet more bigotry or "just asking questions" rhetoric that they get literally everyday of their lives.
Does this derail what may be honest questions? Sure, but when you get 90% hate and 10% good faith and cant always parse the two, sometimes you filter out all 100% for your own safety.