They are sick of people who know things being in charge of the stuff that they know about. We need a fresh perspective from people who don't know much.
You can skip the opening comments but each Senator only got 5 minutes of questions. It is interesting to watch the whole thing because there was a lot of fighting between the Senators.
There is considerable debate within the Trump camp and broader Republican Party about announcing Trumps choice for the Supreme Court as early as Monday. Trump wants to do it. Many others want some of the issues surrounding some cabinet nominees cleared up first and save the Supreme Court announcement for late next week.