We live in such a binary gender world. Either male or "pure" female. Nature is not that simple, and won't be put into a box.
I'm a golf fan, and recently saw that the LPGA is refusing a transwoman the right to compete to enter the league. They talk about the physical advantage that T women may have, but I think it's more about running a business and eliminatin the "ewww" factor for a lot of ignorant sports fans and corporate sponsors.