The underlying premise of this post is an autocratic one, wherein a manager is assumed to be the originator of value for whatever dominion they rule. In this model, the higher said manager exists in an org chart, the more value they purport.

For example:

  People generally don't do what they're told, but what they
  expect to be rewarded for.

The kindest way I can describe this managerial perspective is "transactional." A more honest description is feudalistic.

And:

  Finally, don't expect people to enlighten you and tell you
  what your blind spots are. Becoming a manager means losing
  the privilege of being told what's what.

This sentiment is the same found in many writings throughout history, often regarding kings and the like.

But managers are not kings. No matter how much they wish it so.