If you tell a young girl that she can't be a doctor, a pilot, or any other professional whose job requires a lot of thinking and intelligence, she's going to believe it, sooner or later, and regardless of her actual intelligence, she'll limit herself to what she sees as "dumb", or "girl" jobs.
Likewise, if you tell a young boy that he can't not be a rapist, that his destiny is set based on his body, he's going to internalize that, and he's going to act as he thinks a rapist acts.
There is an element of self-fulfilling prophesy, here.
Anyways, if there's any one group that is categorically guaranteed to not wield maleness, it's transwomen. Simple logic, really. What possible reason would they have to draw attention to a biological fact that is likely to get them beaten, or worse? In what situation has being transsexual ever been an advantage, societally? I honestly challenge you to come up with one.