Is PR philosophy?
It is not merely unnecessary for a CEO to spend time considering ethics, politics or sociology, but even a disadvantage. Rather a CEO should take the advice of public relations professionals. Then he would fulfil his fiducial duties with good outcomes, not with good words.
It was Aristotle who wrote that it is:-
... not merely unnecessary for a king to be a philosopher, but even a disadvantage. Rather a king should take the advice of true philosophers. Then he would fill his reign with good deeds, not with good words.
(in On Kingship)