You might find out that the devil you know has a harder task than you give him credit for. It would be very arrogant of one to assume one could do as well in the same place.
The politics of that position would be something else. The operational and political accumen a guy in his post carries with him would be sorely missed and highly valued by others. Think about what you fly and how it's flown....did it just turn up out the front?
Bit of balance guys.