Fisher is two things: 1) insecure, and 2) believes his own BS. Bad combination.
It is in his insecurity that he hires OCs that he knows he can control and who will do his bidding AND make him look good. His forte is D, but he knows little about offense, but has to appear as though he does. So he demands a certain philosophy and finds an OC who will stay within it. Because his teams are mediocre, he is a "players' coach" to win their favor so that there is loyalty. It is that loyalty that he relies upon.
He has a side that believes his own self-delusions. It is his doggedness in his beliefs that can be an advantage for team stability. But that same doggedness also tends towards refusing to see that what he's doing is not working. It's not his plans that aren't working; it's others. He can't admit to himself he's made errors because if he does, it creates self-doubt.
Contrast McVay: he KNOWS that he knows little about D and it doesn't bother him. He's an offense guru and so that's what he concentrates on. So, he says so publicly and then hires a lifer DC and turns the D over to him. McVay is secure in himself and doesn't need to know everything about everything, and doesn't try to make people think he does.
He has a doggedness of beliefs, but they are standards of behavior and a philosophy of playing aggressively, creatively, and loosely and not having a fear of losing. But, he will publicly state that he has to reexamine some things when they're not proving out. He seeks advice and counsel of others and gives credit to others.
I don't know for sure, but I've always thought that Fisher is a decent, upstanding man. However modern football and football players seem to have passed him by. He wants to use 80's era tactics and plans to win 21st century football games because he believes in them so much.....and it's because it's all he knows or wants to know.
I don't see Fisher working for any NFL team in the future; for one reason, the modern coaches don't know him.
