Why is medical school difficult? Or, if it isn't difficult, why it should be

Given the intellect and motivation of the idealized contemporary medical student and the structure of contemporary medical education, one might not expect medical school to be difficult; experience dictates otherwise. Since medical school prepares one to become a physician, the inherent difficulty of medical school is expected to lie in the areas of the physician's attitudes, skills, and knowledge. This expectation is not supported; instead it is suggested that the difficulty may actually reside in the fact that the student must negotiate three different learning styles in the course of only two years.