This question already has an answer here:
I post this question because of a condition of human behavior. I don't know the name for it but, it is the phenomenom that we as humans assume that a person with a given label is incapable of erring. Therefore, our brains tell us there is no need to shop around.
I do apologize to all the moderators who feel slighted by this question. Please try to see it my way.
If a user with a low reputation posts an excellent answer, and a moderator posts an answer to the same question, the poster and other readers will naturally lean towards the moderator's point of view.
Here is a great example: The actual answer only received 390 up votes, while Jon Skeet's somewhat tongue-in-cheek answer received 793 upvotes, not including all the comment upvotes. (Ultimately, Jon points out his answer is flippant, and it was not selected.)
One comment even suggests...
@Jon Skeet, press space bar for 10 times and than put a "." I bet you will still get upvotes, This is hilarious! – krio yesterday
The other issue comes from the mentality. I know I have thought this before: "Oh [They] already answered it, I'm sure it's right… Why should I bother providing my answer?"
I think moderators should avoid answering questions. If they find a question that they want to answer, instead of answering maybe provide comments that the poster or readers will encourage more activity and possibly result in an answer.