Simon says, “Defer to others when they are more knowledgeable, skilled, or competent.”
None but a certifiable power junky would go with his own ideas and skills when someone more competent is readily available. Nonetheless, power junkies are more prevalent than you might think. You can find them mostly in the middle ranks but rarely at the top. Leaders do not get there by ignoring or overlooking expertise in others and especially not in people whose knowledge, skills, and resources can increase their chances for success. Skilled leaders take full advantage of whatever may give them the winning edge.
Simon’s reason for deferring to the expertise of others goes a little farther, though. He truly values differing styles and opinions. Each person on the team has know-how, skills, and resources unlike those of anyone else. They all have their special areas of expertise. They also have their individual approaches, ways of thinking, and perspectives. This gives fullness and flavor to the team. Not to take advantage of this richness would be like ignoring the matador when he suggests you let him handle it this time.