I lost one of my friends to the tulpa crap a few years ago. It's self-induced schizophrenia and it ruined his life. He lost his job, all of his friends, and last I heard was living on the street.
Schizophrenia is more common than people think. Happened to a family member but medication calmed the voices and they are steady now. I wonder what it takes for people to accept they are not well though…