The heart of the matter is that elusive quality called 'Captaincy'.
Those who have it know just what I refer to, those who don't aren't quite ready to step up the plate, yet.
I am pleased to say that I have worked with many corporate crews from low to high timers who have obviously got 'it', and certainly in the Bizjet world its a real amalgam of qualities; personality, experience, and training. Sadly however, it can still be lacking in spade-loads from the most unexpected quarters.