I don't understand the desire to make it seem like you know everything.

If you learn something from someone, is it that much trouble to give them credit for expanding your horizon?

If this mindset is recursive down your organization's hierarchy, doesn't it create a scenario where a legitimate critique never gets heard because people don't question the decision of a higher ranked employee because there is the impression that they know more than you?

Seems like you and your employer are worse off, but your ego remains intact.