So, and this may sound like moving the goalposts but bear with me for a second, can you correlate the increased number of referrals with an increased incidence
of gender dysphoria? It seems to me that, much like diagnoses on the autism spectrum, the ability to identify it has increased significantly in the past few years. Funny you mention something like Asperger's in the same breath, actually.
In order for this to be a 'trendy' sort of thing, it must be discovered that many of them do not, in fact, have it
. That's kind of important, and I'd be very interested in seeing any data that supports that. Gluten intolerance I'll absolutely agree with you on, but that's because we actually have data disproving the popular conception (that is to say, Celiac's Disease or you shouldn't actually care). Asperger's (and other autism spectrum diagnoses) we can point to an expanded definition of autism over the last couple decades, and an improved detection method in younger children.
I also note that the article goes out of its way to note that physical changes are disallowed until the individual hits puberty, so the objection about "applying to children from the parents" seems to fall a little bit flat. What are you going to do when your eight/nine/ten/twelve year old son tells you he doesn't feel right being treated as a boy? Tell him "too bad, you'll just have to be miserable"?
Truth be told, I imagine it wouldn't be quite as widespread if we collectively as a society didn't rigidly enforce gender roles so damn hard.