Well, yeah. Would you like to be reduced to your biological functions? And shouldn’t the people concerned get to decide how they are referred to?
Male predators are unlikely to undergo physical transition in order to gain access to single sex spaces like toilets and prisons and hospital wards. But if all they have to do is wait three months and sign a form, that’s very different. Obviously in the case of restrooms a sign on the door will not keep all predators out, but it does mean businesses etc can legally remove them without being accused of discrimination.