Well, any branch of medicine is part science and part art, so to speak. The science is in the research, the technology, the medications, etc., but it takes the art of a skilled practicioner to get a good outcome. Alas, too many psychiastrists, I have been told, are the "losers" of their medical school class - a specialty of last resort for those who can't hack it in fields like neurology, oncology, cardiology. Don't know if that is true, but my current T, who has a PhD and to me seems a really excellent T as well as a nice guy, told me that, and I do believe it, as it's consistent with my experiences, albeit rather limited to a few.