Why do people who hear voices

I think it's the combination of repression, low self esteem, and wish fulfillment. The low self esteem cannot approach the desires, because it is not worthy of having any kind of wish fulfilled. So the only approach available, is one that gets projected onto a thread of internal dialogue, that by neccessity, has been ego tagged, and separated from the normal process. The ego tag means it can contribute to any dialogue, yet still remain outside of any cohesion with the personality. Which gets spooked, because a separate ego is now building a secondary personality, full of the things that are unthinkable in the normal state of affairs. Antagonistic, and undeveloped, these voices have the mentality and egocenticism of spoiled toddlers. And if they want you to kill whores, then you eventually end up in Rampton, or Strangeways. Hopefully. Depending on how effective you are.