My guess is that arguing with hatred like that is useless. Most people never find themselves in direct opposition of hate like that, to most of the people around them they are acceptable or if not, in too much of a majority to mess with. The sad reality is that most of the groups that hold unreasonable hatred can and do easily turn that on trans people. There are even people who consider themselves loving and tolerant have that nothing but hate for us.
Makes it easy for me to understand why anyone would choose stealth.