Why do people prefer unconventional treatments?

Any number of reasons. Cultural heritage, things like acupressure, acupuncture these are things there grandparents did, and their grandparents grandparents did and have been recorded to have positive results by generations of family. distrust in doctors and pharmaceutical companies egged on by the last ten years of poor conduct and blatant endorsements by doctors towards certain medicines, just to put an extra buck in their wallet not because they needed them. Also hospitals and doctors offices tend to treat people like walking charts with insurance rather than people and they feel that. People like to be treated as such. So they try something else. Anything else. Is it the best thing for them medically? Probably not. But happy mental state has to be worth something when it comes to your physical health there must be at least a small correlation.