Being knowledgeable about how to efficiently run a machine doesn't mean you know how to design and build your own machine.
Saban is an extremely effective CEO. Pruitt is someone who he hired to carry out tasks as directed by him. Saban planned, designed, and had a machine built and hired Pruitt and others to operate it. When this light comes on, pull this lever...when the machine makes this particular noise go over and press this button, that kind of thing.
Pruitt, like many other Saban assistants, is an order-taker. I know that sounds demeaning, but it really isn't, because it does take some knowledge and ability to be able to run a complicated machine. However, that doesn't mean Pruitt knows the first thing about going somewhere else and planning, designing, and building his own machine and bringing in capable people to run it. The fact that he worked for Saban probably gives him an inflated sense of self-confidence, hence his hard-headed attitude.