The commander is the one person we look up to.
He knows our concerns and our deepest fears. And he is this little voice in the back of our heads that tells us to strip them off.
In times of dispair, he cheers us up.
In contemplation of imminent defeat, he gives us hope.
He tells us what to do and when to do it. Because he always knows the right thing to do, even when the chances are stacked against us.
He has the plan that leads to victory and we are happy to follow his orders blindly.
And while we are far away from home he guards our base.
He kindly shares his wealth and deluges us with upgrades.
And when your actions please him, he might even heal your mortal body's wounds from his heavenly throne.
He doesn't know any such pathetic weaknesses as fear or misjudgment that are reserved for ordinary human beings.
Because he is perfect.

So if you show fear, it is obvious that you are not ready to be our commander. Our one true hero.