Sleep induced psychosis is a thing, if u don't get proper sleep you go crazy. Additionally, we know that excessive use of THC affects your ability to get proper sleep, and can cause psychosis if not full blown schizophrenia.

If you look at factors for schizophrenia, a lot of them involve a disturbing environment. Being born in spring, a loud season, being born in a city, a loud place, being brought up in a chaotic and traumatic household, all of these seem to have in common the possibility for disrupted sleep.

So is there any possibility that schizophrenia could be the brain not having the opportunity to develop properly due to poor sleep in infancy? Getting good sleep is good for a person's creative abilities, hence things like dreaming. But if your brain never gets the opportunity to properly develop that, it might develop to interfere with waking existence, like your brain making up information and connecting dots when it shouldn't be. In a sense, schizophrenia is when your brain doesn't know how to differentiate between being awake and asleep. This is interesting because you cannot be schizophrenic if you also have congenital blindness. If your brain doesn't have the faculties to process light, an essential part of daytime-nighttime differentiation, you can't become schizophrenic.