As Americans, we take for granted that those we entrust with significant authority have been judged by their peers to be competent at the task. Peer review is a concept commonly accepted in most professions. For instance, in medicine “peer review is defined as ‘the objective evaluation of the quality of a physician’s or a scientist’s performance by colleagues.’” That is why we license plumbers, electricians, manicurists, doctors, nurses, and lawyers. We do this in most aspects of life — except politics.
Kamarck, Elaine. "Returning Peer Review to the American Presidential Nomination Process." New York University Law Review 93.4 (October 2018): 709-727.