I consider David a friend but he doesn't really offer a scientific reason as to why Semenya shouldnt' be able to compete. He does write this:
Epstein wrote:
Over time, I’ve become more drawn to the argument that athletes, like Semenya, who have been raised as women and who have lived as women and who identify as women should be allowed to compete as women. But Joanna wouldn’t be Joanna if she didn’t push me to think very hard about why I feel that way.
But then never really says explains scientifically why he thinks Semenya should be allowed to compete.
The criteria for competing in women's sports can't be "raised as a woman". What does that mean? The high school sprinters in connecticut, who used to be on the boys track team, are now being raised as women. So are they good to go? Ok, well what if you transition at age 5?
It's precisely because gender is hard to define is why we need to have medical cutoffs.
Do I think the science used to ban her was shoddy? Yes. And I can see why as a scientist he is bothered by that but it's hard to do great studies on that as there aren't very many intersex people in the world.
But let's don't over think this. Semenya is an intersex human who identifies as a woman. Intersex athletes should compete in their own category or the open/men's category. There is no human right to be in the women's category of the Olympics.
The reality is when I've asked experts on the matter - even one whom he quotes in his piece - if Semenya could ever biologically have children herself, there has never been any hesitation as to the answer. They all said there was zero chance she could ever give birth (no ovaries) but they weren't sure if she could father a child with her internal testicles.
I'm not saying the ability to give birth should be the criteria for women's athletics but am just using to point out how she's what almost anyone would describe as intersex biologically.
One last thing. He writes, "My experience doing investigative reporting on medicine has also made me feel skittish about medical interventions for asymptomatic people, even if they’re generally safe."
I agree. But she's not being forced to take drugs. She can be like the rest of us the 99.9999% that never make the Olympics.