I'm not sure, I don't know much of what she says. Is she as openly bigoted as JKR?
I guess this is going the direction of the thread title, as in: a more general discussion on transgender people in sports. Which is a topic I find hard to discuss, since on one hand I want to be able to give transgender people as equal rights and opportunities as possible, and yet I still kind of agree that it's difficult to argue that someone who was born a man, and maybe even went through puberty as a man, should be allowed to compete against people born as women. But at the end of it all, I would say that I don't know enough about gender vs sex in the context of sport, how much puberty matters, testosterone levels, etc. By which I mean, the scientific thinking at the moment, not random people from the street.
However, I was addressing the parkrun 'issue', where I would say: parkrun itself isn't a competition, there's no prize money, or big honour involved in it, so let's just allow transgender people this one area to feel welcome and accepted in sport, and not debate every minute detail of their lives and whether they're accepted there or not.