Just because luck plays a part in everything does not make it moot.
Set up two identical agents in a game with rules guaranteeing a winner, and you will end up with one loser being equal to the winner.
I agree that CEO positions in aggregate are likely generally filled by people better at "CEOing", but there is nothing ruling out "losers" who were equally skilled or even better that just didn't make it due to luck or any of the innumerable factors playing into life.
