Hm, looks to me like you committed the noncentral fallacy twice. "Scientific evidence"--evidence can still be evidence without being "scientific". "Quackery"--yeah, there are people who scam others with fake medical advice with little regard to the others' actual health. That doesn't mean that all medical advice from non-doctors should be disregarded. For example, I resolved a long-standing repetitive strain injury thanks to this guy. If I decided to disregard his advice because he wasn't a doctor, I'd probably still be controlling my computer using voice recognition (did this for almost a year and it seriously sucked).