I think you're way off on this Handy. Not that I want Oprah to be President anymore than I would want Donald Trump to be President, but all elections have always been popularity contests. Even between people who are "politicians" instead of celebrities, we frequently talk about name recognition as a factor in the election.
Why do you have to be a politician to become elected President? We elected Eisenhower who was nothing more than a celebrity general.
The thing is, if Donald Trump were not corrupt, and if he had done what he said he was going to do and appoint talented, honest, "the best" people into his cabinet and other government positions, a "celebrity" president would work out just fine. Might even actually be a good President, since a lot of what we rely upon them for is to lead the country where it needs to go by persuasion from the "bully pulpit." If Oprah can convince millions of people to buy some stupid book, maybe she can convince the country we need universal health care or a change in the social security system, or whatever.
The problem is not having a celebrity president, or one with zero political experience. The problem is electing one who is corrupt and will only appoint corrupt toadies to his administration.