Earlier quoted context omitted.
> If a medical drug were proven ineffective as anti-depression drugs have, doctors would have to stop prescribing it or be sued for malpractice. Anti-depressive (and other psychiatric) drugs are a subset of "medical drugs". > You can't sue psychologists for malpractice, because there's no such thing as good psychological practice for comparison. You can, in fact, sue a psyschologist for malpractice [1], but a psychol…
> Anti-depressive (and other psychiatric) drugs are a subset of "medical drugs". No, they are not. Medical drugs are prescribed by doctors to treat medical conditions, not psychological ones. There are some medical drugs that are prescribed off-label to treat mental conditions, but that's a shady practice (albeit a common one). > You can, in fact, sue a psyschologist for malpractice ... Yes, but you can't compare wha…
There is no such thing as a "medical condition". There are physical conditions (of which psychiatric conditions are a subset) and medical (as opposed to, e.g., surgical) treatments for physical conditions.
For psychiatric conditions not to be physical would involve mystical mind-body dualism, which is an anti-scientific proposition.
> Yes, but you can't compare what he does to effective practices, because there aren't any.
Psychological malpractice is generally a subset of medical malpractice, whose standard isn't about "effective practices" but, like all professional malpractice, is about accepted standards within the profession.
> This is why such cases are so rare
Psychological malpractice cases aren't that rare. It's probably somewhat harder to establish causality in psychological malpractice cases than, say, some of the more obvious kinds of surgical malpractice cases, but that's not a matter of standards but of the difficulty in tracing particular harms to particular failures to meet the professional standard of care.
> why malpractice insurance is nearly unheard of among psychiatrists and psychologists.
Malpractice insurance is a practical necessity for psychiatrists -- who are, after all, medical doctors -- and is not at all uncommon for psychologists in clinical practice.
> Many psychologists and psychiatrists have ruined the lives of their clients but proved immune to prosecution
And many medical doctors in specialties other than psychiatry have killed patients and yet not been successfully prosecuted. That doesn't mean that medical doctors are, as a class, immune to malpractice claims, it just means that not every thing that they do that ends up causing harm ends up resulting in legal liability. Psychiatrists are no different.
> unless by the term "psychologist" we mean anyone practicing clinical psychology
Psychiatry isn't clinical psychology, it is medicine, and its practiced by medical doctors with a particular specialty, not psychologists. Making up your own non-standard definitions of terms to justify your completely inaccurate rants isn't helpful.