Really? I call. There has to at least be a shade even though I think he was incorrect.
Because otherwise all bosses would be equally shitty and you would not be able to foresee with uttermost certainty how bad people will become shitty bosses when promoted to power.
It is equally obvious in the military how you know who will turn out to be really bad people once promoted to sergeants.
The upshot is that "Okay, we just need to find someone who power will reveal is not shitty." does not and cannot work in the general case (of amounts of power sufficently large to be worth abusing - your 'good' sergeants are still sergeants, not generals or absolute autocrats).
Because otherwise all bosses would be equally shitty and you would not be able to foresee with uttermost certainty how bad people will become shitty bosses when promoted to power.
It is equally obvious in the military how you know who will turn out to be really bad people once promoted to sergeants.