We can agree that there is no factual ground to psychosis. However, for thousands of years cultures have used it to find spiritual clarity. While I am not arguing for hallucinogenics, some people will undergo psychosis no matter what we do to stay healthy. Not everyone can escape it. Psychosis is a venture into the chaotic world of unconscious natives. It does not follow the language of logic. Psychosis sets fictional narratives that come from our personal identity and growth. It is what the mind does when it is so far gone that I cannot make sense of the world coherently and I would never recommend inducing it, however if you have had psychosis, look into the parallels of dreams.