Miriam knew that being trans was the twist of the show, and was the only contestant to know. It would be strange if Miriam assumed all the men would be accepting, therefore knew he was putting men in an embarrassing position.
TV does use people, so i have sympathy for everyone involved, but Miriam was using the other contestants and didnt think about their consent.
Similarly, if a man entered a womans space, undressed and then everyone has sympathy for the naked man because all the women could talk to each other about the experience, and the man had no one to talk to. Its ignoring the situation miriam willingly took part in.
Hopefully, everyone getting themselves involved in reality tv understand it more now. It was a cruel concept for a show for everyone involved.