About 5% of people hear voices but not all who hear voices are sz, there's a functionality component, you have to be at least subtly impaired in some way be it socially, academically or in your work to have sz or psychosis. One of my friends believes that she is psychic(hears voices) and has guides, but goes to work, has friends etc so she's not considered impaired and is just a voice hearer. Of course she's never been to a pdoc either so they might dx her anyway, depending on the pdoc.