I’m not quite sure when it was that suffering was only legitimate if it came with medication and a diagnosis, but it doesn’t seem to helping anyone much
Putting the medication aside, I think that being able to name one’s suffering as a category of human experience can be quite helpful, as it allows the sufferer to contain their symptoms and develop communication about it.
There’s a whole section (section III) in the DSM for unofficial disorders. Some of them, like Seasonal Affective Disorder, are already commonly accepted in the general public.
There is also the issue of diagnosis creep, which is the tendency for the definition of a disorder to broaden, causing more and more people to be diagnosed. This is not just the case with mental health disorders but even physical health disorders like diabetes and osteoporosis.
It seems in the scientific field there is regular expansion and contraction of categories (in biological classification they call this the lumpers versus the splitters). I recently found out that OCD is split into dozens (by one account close to 100) subtypes. And we were just discussing in another thread how the PD’s got all lumped together in one category in the ICD.
With regards to the compulsion to label suffering, I think the Buddhists would agree with you. My Buddhist friend (who has PTSD and Panic Disorder but treats his symptoms through his Buddhist practice alone) would say that the core of human experience is suffering, no one escapes it. I’m not that enlightened so I need the labels and categories and coping skills to shuffle it around in my head.