I’m not sure that this doctor has a good notion of “belief in a vision.” That isn’t the same as self adoration, and can in fact differ starkly from it. Belief in a vision has a transformational power, while self adoration keeps one where one is. Most notably, Donald, who was never before known for caring about his upbringing religion of mainline Presbyterian Christianity, is now sold on Christianity’s essential value in the American context. He and Melania have become faithful to one another, with no playboy or playgirl activity in sight.
Some people just use the term “narcissism” to mean “I don’t like what you believe in, so I am going to call it something denigrating.”
Not everybody finishes at the top of the class but they still get called doctor.