Earlier quoted context omitted.
Someone very close to me had a serious mental illness. Nobody has any idea what the illness is. Different doctors give it different names. The same doctors give it different names. I eat the impression doctors are less worried about the “anatomy” of the illness, and more worried about finding a cure. If “take these anti-psychotics daily, get 8 hours of sleep a night, and meet weekly with a therapist” prevents symptom…
You seem to be implying that this is a bad thing. Diagnoses and categorisations are all fake, and constructed. The only reason why it's interesting to diagnose is that we may notice similar treatments are helpful for people with similar diagnoses. Diagnosis isn't inherently useful; it's a means to an end.
When people are sick they want to know “what’s wrong with me.” When given medication they want to known how the medication works.
Unexplained healings are better than being sick, but not as good actually knowing what was wrong with you.
For example, someone has 6 hour episode where they detach from reality and have intense hallucinations. What are these hallucinations? Repressed fears? Forgotten desires?
These hallucinations are possible the most intense phenomena this person will ever experience. What do they mean?!?
The real upside is that psychiatrists have the humility to say “we have no idea how this works.”
The downside is it leaves room for pseudo-experts to peddle whatever trash they want.