Psychosis is a medical term for a collection of symptoms that indicate a loss of contact with reality. He posits that reality is that AI cannot automate nearly as many things as people believe it can, while C-suites ignore that reality and dive head first into belief without evidence. Tell me how using that term discredits the author.

That's not psychosis, that's just being wrong. Perhaps read something: https://en.wikipedia.org/wiki/Psychosis