I'm one of those postmodernist types who (allegedly) doesn't believe in truth or science or anything like that. But even I'm surprised at how quickly the scientific method or questions of evidence have been repudiated here. After all, even as a postmodernist, if I were to undertake a medical treatment I'd like to know that I was apt to do better than the placebo group. And that the benefits would likely outweigh the side effect profile. I can put myself in a control group quite easily - all I have to do is nothing. Is the treatment going to get me anywhere? I've never felt a strong desire to transition, but if I did, I'm sure these kinds of questions would be uppermost in my mind too. All the more so given the severity of the interventions and the fact that one is committing oneself to a lifetime as an invalid. So the benefits better be good.
It's almost as if they've read Foucault not as a social critique but as if it were an owners' manual. Regimes of truth enforced through power, you say? Right, let's get on with it! As discussed on here, you can see it in Nature, Cell et al, and maybe, by the end of today, in the BMA too.