I don't know anything much about the topic myself (programmer here, not even remotely a neuroscientist) but it'd probably be really helpful if you told the class why his post is a poorly researched oversimplification rather than just saying it is. Give us the fucking scoop.
The language they use in their TLDR is a pretty big clue. So is the fact that they don't link to the research beyond 3 cherry-picked papers.
This is 100% untrue.
Dysphoria is a thing, however, not something everyone could understand or experience, and usually in those instances there's evidence of a physical misalignment or clear chemical data that shows you have a deficiency or some other chemical imbalance in your brain.
Credible researchers have been looking for markers for a long time and it's simply not the case that there's evidence of "physical misalignment" or "chemical imbalance". Trans youth have exactly the same hormone levels as cis youth. Imaging tells us nothing. This is why the puberty blocker issue is so controversial. Research shows that the majority of youth who identify as trans "grow out of" it but we have literally no way to know which ones won't, which means puberty blockers are currently being given to the majority in order to benefit the minority.
Critics and supporters alike wish that there were definitive markers - we could just order a few images and blood tests in that case - but there aren't. Being able to objectively identify dysphoria wouldn't make "tucutes" go away, though. We'd still have to classify them as having some kind of disorder and decide how it's best treated.
There are certainly some valid questions to be asked about the relationship between disorders which interfere with normal inhibitions (most severe developmental delays, dementia, TBI, etc) and "tucuteness". Answering those questions is going to take longitudinal studies with control groups. Even if the links are confirmed, it won't necessarily give us useful information about how to proceed.
We kind of went through this with the hunt for a gay gene. A lot of people wanted one to be found so that the "lifestyle choice" narrative could be refuted but others felt that finding a physical cause would establish being gay as a "birth defect" to be identified and treated (and that people may even test for it prenatally).
This is just bullshit dressed up as scientifically informed opinion. It's the equivalent of the (untrue) "depression is caused by a chemical imbalance" argument.
The only thing is, almost all of these instances have names already put to them, and can usually be shown on physical inspection, through blood testing, or through brain scans. Not everyone has any way to actually know whether or not they have the wrong chemicals pumping through their bodies, and not many of them are actually permanently treatable beyond physical transition. The only difference is that those who transition and have those types of issue are almost always much happier and better off, and usually a lot more mentally stable to begin with beyond the typical depression or anxiety that comes with actual dysphoria. They could all likely have themselves tested for any chemical imbalances or abnormalities quite easily for confirmation, but it usually isn't required.