I dunno, if you watch enough of Congresspeople appearing on TV, you start to realize that none of them seems to have a clue about the issues, either. All they do is regurgitate talking points and duck any questions and then circle back to repeating their talking points. I don't think there is much that your average member of Congress actually brings to the table that makes them fit to be president. I mean, there's even a saying about it - politics is for people who are too ugly or untalented to make it in show business. It's kind of a cruel sentiment, but there's also a nugget of truth to it. And now with the 24 hour news cycle, politics more than ever is as much performance art as it is anything else.
I don't know that Oprah is "better" than Trump, in terms of being willing to put in the work and actually gain the knowledge and competencies necessary to actually do the job. I do know that she actually had to work for everything she has built, whereas Trump had it all handed to him by his parents, so I don't doubt the work ethic is there. But beyond that, who knows?