Therapy/counseling are important, yes, but the whole "support" and "thinking positive" and "smiling" is just BS. That works if you're sad, not if you have clinical depression.
So what "can't see" diseases do you believe are real, since anorexia, bolemia, alcoholism, and depression aren't "real" diseases to you? (and I don't know where you stand on chronic fatigue syndrome either, but I'm guessing you're with Pooj and the "lazy" line of thought).