The CEO is not some masterful person answering all the questions for the company, I would argue that a CEO should be able to disappear for a year and if they had done their job correctly and assembled a good team the company would do just fine without them.
No the purpose of the CEO is to safeguard the Capital that has been invested in the company. That is all. They make sure it doesn't walk our the door in wages or other wasteful spending. They are the Capital's man on the ground.