Businesses are lead by autocrats -- even public stock companies -- the shareholder can only proxy to management or challengers.
Have you ever been around surgeons and their subordinate personnel? The relationship is more like a fiefdom.
Why would these sort of people be qualified to run one of the most important nations in the world?
Even Ronald Reagan was the Governor of California (1967?75) he was ''schooled'' in the administration of a large governmental unit.
A leader of state has to know the workings of government to get things done -- the President is not elected in the USA as a dictator. The USA is a representative democracy, a republic not an autocracy.
If you think we have political deadlock now ... you are just asking for more with ''he is not a politician'' line. That leads nowhere in the end game and is most likely a nonstarter.
These fringe candidates can bring platform changes to their parties' conventions. Including the extremist socialism of Bernie Sanders and Republican Christian extremist candidates -- they are there to shape their respective party's platform and represent a segment of the voters wishes or demands. That is how the game works and the game has been going on for over 200 years in the USA and it's not going to change this year.
You can change some of the players of the game as you go but it is still the same game