The reverence, adoration, awe reserved to people in leadership positions is what in most cases will make them lose their authority and power.

If you really care about the person, if you like them, want to work with them, want to learn from them, want them to stay in the job for as long as they decide to, then you owe them a challenge, a question, a contrarian point of view, a new idea, a plan they had not though about, a truth they did not want to hear. It is your obligation.