This is a half-baked thought but I'm kicking around the idea that this hyper-pathologizing urge is the opposite side of the normative coin whose obverse is grindset culture.
The grindset is an extremely narrow and rigid concept of what's "acceptable" in society and I feel like the shadow that casts is that therefore everything else outside of it is inferior or bad. Throw in that weird online tendency to weaponize therapyspeak which has been on a massive upsurge in the past few years and it feels like the natural consequence of that coupled with the grindset normativity results in everything outside of the grindset being turned into a pathology.
Idk I think I need to take this idea out for a spin a bit more before I decide whether it's actually accurate and maybe grindset isn't quite the right term here but I'm sure you get the kind of culture I'm trying to point at with the term. It's like some sort of cultural phrenology or something.

art is emotional piracy, and piracy is cool and good