This explains a lot

Part of the resistance against making decisions comes from our fear of giving up options. The word “decide” shares an etymological root with “homicide,” the Latin word “caedere,” meaning “to cut down” or “to kill,” and that loss looms especially large when decision fatigue sets in.

- From "Do You Suffer from Decision Fatigue?" by John Tierney, New York Times Magazine, August 17th, 2011