As I remember it, there was a time when the first episode was called a “psychotic episode,” and schizophrenia, once diagnosed, was considered a long term illness.
“A quarter of those who have experienced an episode of schizophrenia recover and the illness does not recur. Another 25% experience an unremitting illness. The remaining 50% have a recurrent illness, but with long episodes of considerable recovery from positive symptoms such as delusions, hallucinations, disordered thinking, and catatonic movements.”
I think you have to see this in the context of better treatment.
A little over 50 years ago there were no medicines that could help. Now we have these chemical straight jackets and they work well for a lot of people. Well enough that we’re allowed outside.