Hasn’t it sunk in yet? Trump is the Great Pretender! Like all con men, he is expert in conning people and getting them to believe what he says. Trump is all talk and no he doesn’t really have a clue. He appoints people with images that fit his team agenda not because they are particularly skilled and would do a good job in the position. Pruitt is anti-EPA at root and Trump likes that so he gives him the job as head of the EPA. Pruitt fits the Trump team anti-regulation image. Sessions did too but apparently is a bit too involved in the job to just automatically do what Trump wants without question. He may have to go because of that.
Trump leaves all these many positions vacant because he doesn’t understand the needs of governmental operation except as a con man would. It is all surface and appearances to Trump. The princeling gives an order and expects it to be obeyed - not to have to listen to the reasons why it is impossible. To rule is not necessarily to know how to rule. To be put in charge is not the same as being the right choice for a job.
Trump creates chaos amid distraction because he truly is incompetent in his job. He knows only how to create an image, as con men are able to do, of his doing the job and doing it well despite the growing evidence of his failings. For Trump everything he does is always described in hyperbolic and glowing terms as being really wonderfu’, the best - only the best etc. Trump is a superb con man who was born rich and that helps him convince people that he knows what to do!
He actually doesn’t know how to be the President of the USA and from all the time he spends golfing and tweeting, he doesn’t really try to be either.
With Trump, the office of the Presidency is on hold. We are being conned if we think otherwise!