> we shouldn’t forget that schizophrenia is mostly social and psychological in origin

While it's not possible to completely decouple biological and social risk factors, my understanding of schizophrenia is in direct contradiction with your claim that it's primarily social.

As I understand it schizophrenia, the extremely high heritability strongly implicates biological factors. Beyond heritability, many of the other risk factors also implicate a biological basis, from microbe infections, drug use, and pre-natal biological stress (nutrition, maternal health, etc).

None of that contradicts the need to treat people suffering from schizophrenia with empathy, or to improve the social situations they're in, but I think your central claim about "mostly social" is wrong, and undermines the rest of your argument.