Sexual orientation and gender identity are two separate issues. Bruce Jenner, who identifies as a woman now calling himself Caitlyn, still prefers women sexually. Just because someone is trans doesn’t necessarily make them gay or a lesbian. The person walking into the restroom who is biologically male, yet identifying as female, may still be subject to the same wants and desires of anybody in the next restroom over. Also, perverts have been trying to sneak their way into women’s bathrooms and locker rooms to do heinous things for years. Now they have license to do so.
I don’t play games with the media’s or the cultures attempt to define things, but I do know that men using girls’ restrooms is stupid and an invitation to disaster for some poor woman/girl.
So, I agree with the thrust of your post.