The fact that transgender people exist is quite settled from a scientific perspective. Most reasonable platforms will not put up with people asserting that trans people are either mentally ill, clout-chasing, or victims of abuse, in the same way that most reasonable platforms will not put up with arguments that Black people are a criminal race because <insert debunked science here>.

Dissent along those lines, no matter how politely framed, is simply an attempt to launder bigotry into "debate".