How should a doctor know how to treat you if you don't tell them what caused the problems? Doctors don't just hear you list a bunch of things you are "feeling" as symptoms and then output a pill to take. They need to look at your overall health, wellbeing, symptoms, medicine you are taking, diet, etc.

You can't just show up to a hospital with crack or heroin withdrawl and be like "I don't feel well, please help me". They are going to ask why you don't feel well.