Shane,
to go buy what your saying one would first have to believe that XX and XY means female, male, and that would mean that other states of sex identity do not exist. There are males with XX and there are females with XY, the problem in the TS community as with many others is they buy into what the so called "Professionals" want to keep "fixed in place", as if they (doctors etc) have a clue of what male and female are, and truth is no one does. So what is a XX person with a testicle and ovary? I could list a number of other variables, but I think this makes the point. Re production abilities or lack of, does not determine a persons sex. If it did we would have to say that a XX woman that does not have the ability to reproduce is no longer much of a woman, and I think history shows us,, women do not appreciate that.
The world may not appreciate this, but there are males that have babies and females that don't, depending on how one defines male and female, and if we go by the socially accepted method then we will remain confused and evolution is going to take care if it all anyway. What I want to see happen is people in the TS and the IS community stop buying into these oppressive lies that make them feel as if they have a "Condition" a "Dysphoria" etc. We are all naturally a mix of what nature made us from. There is no well established method of dividing the sexes, and therefore the idea that XX and XY are methods of deciding ones sex is absolutely false and being challenged all over the world.
In CA within the next year you are going to see how this method of determination is about to be used against the TS and the Gay community with rights to Marry, so you may really want to re-consider how you view this, and look past the claims of science that contradict themselves, dig deep, search for the conflicts and realize that nothing is as it seems.
Peace,
Taylor