However, there is a bunch of psychiatry and psychology with treatments that are helpful. A guy comes in, saying he's got visions and hallucinations and incredibly disturbing thoughts, the doctor prescribes some medicine, and he's a lot happier and wouldn't dream of stopping the medicine.

Try again. Hallucinations happen; and anti-hallucinogenics work, regardless of societal opinions on the subject. Btw, they're measurable too.

Someone says she's incredibly sad all the time, the doctor gives her an antidepressant, and she's a lot happier and loves the medicine and starts living the kind of life she wants.

Again. Biological depression happens; and antidepressants work, regardless of societal opinions.

(Besides, chocolate and tobacco have less secondary effects, if you really need a drug for depression)

And the benefits (kickbacks from Big Pharma) of prescribing are such that every sadness is called a biological depression. If you are Job and you are sad, sorry, you do not have biological depression. You just have a very shitty life. Adding a chemical dependence is not going to make your life better, but worse. In other words, sadness exists for perfectly understandable external reasons without any link to biological depression and it's not helpful to try to drug sadness out of existence, at least not when it's understandably caused by a reaction to negative life events. And certainly the acts giving you pills and calling it a Latin name do not a disease make.

But comparing pedophilia to biological depression or hallucinations is exactly the dirty trick upon which psychiatry leeches scientific status from neurology. Pedophilia (or BDSM, or zoophilia, or homosexuality…) is not like hallucinations or biological depression.

And the problem is it has consequences. If it truly was between a volunteer patient and the psychiatrist every time, then it's entirely under the scope of freedom of association and I wouldn't dream of intervening on it. But when psychiatry takes control over very important functions of criminal law, the justice system and the school system, it has very negative consequences even for those not directly involved, and has nothing to do with either science or freedom of association anymore.