Art of simplicity is generally driven by a set of rules of thumb.. guiding principles. Purpose is to be focused on the need v/s want.
Some folks make it a habit to apply "the law of averages" in the disguise of practicing simplicity. Averaging is powerful to get a quick sense of "size" of something than the "quality".
It is good to be alarmed by a high average score and use it as a trigger – for the need to go down below to assess the quality – before making a choice….