can I suggest another view on this subject. Transpeople are people whose mental gender is different from their physical gender, surely then they should be able to live across both genders.
For women that is not a problem. I think all of us have at sometime or another known women who dressed and presented as men, usually in gay partnerships, we have accepted them for what they are in the life they live and treated them as men, at the same time as not batting an eyelid or treating them differently from other women when in the Ladies loo or in medical and other biologically female spaces.
The problem is, that for transwoman that is not true. Someone with a female mind, dressing and presenting as female, is almost entirely unacceptable in male spaces, whether loos, male groups, prisons or the like. They are in fact walking into danger, everytime they walk into a male space.
Surely what we should be doing is working is making men as accepting of transwomen as women are of trans en. It is trans women making the running in this fight, because once they come out as transwomen they are excluded from male life in a way transmen are not. Were men to be as accepting of transwomen as women are of transmen so that men born with a female mind in a male bdy could live between the two worlds as trans men do, much of the heat and point of this problem would go.