True. But I think you are being naive if you think that someone's personal beliefs don't impact their clinical work, especially in a field where "treatment" is interpreted in many different ways by a given providers. As Fans of Meehl said, you have many Psychologists that think a 50min conversation with a patient is treatment, or throwing in a few tidbits about good sleep hygiene, is "treatment". I've had enough people in my life receive treatment to know that is all they have ever experienced, so the question is, why are Psychologists not doing the work? do they think what they were taught is BS? do they think its too much work to do it properly? do they think its obvious enough that patients should be able to make the changes on their own? Well whatever the answer is, it is one of the few fields where it seems what you are taught in school has little relevance in actual practice, instead you get a bunch of people with Dr. before their name who get to practice their religion, politics, personal beliefs, and maybe even their own "interesting" treatment methods on patients. It is a great career choice if you are a smart-ass, though.