Explaining
why implies you're on their level, or close enough, which is poison to some people. If you are on their level, you could, conceivably, disagree with them, which would marginalize their authority over you. However, if you are forced to do things because of a "Because I Said So" mandate, well, you can't possibly disagree with an argument if an argument is not presented,
hein?The corrosive effect this has on the ability of the people in nominal charge to come up with arguments is never discussed, but becomes all too obvious when a social factor, such as a religion, loses a "Because I Said So" mandate it once had over society as a whole: The representatives of that religion, accustomed as they are to being able to dictate terms, are incapable of forming a cogent argument in favor of their position. They either rant and rave about how the world is ending, because, from their perspective, it is, or they come up with things which sound like arguments but which have holes in them a child could see through, and many children do.
Dictatorship weakens the dictators. So mote it be.