Thomas Shey
Legend
I am probably recalling it from Amber Diceless, and I always took it as an admonishment to A) only detail things mechanically which are interesting and B) only have decision points if they are truly going to matter (you always have one of at least goal setting).
Its a pretty old principal at this point that only rolling when things will matter is good practice. The problem usually is that people can have radically different thresholds as to what constitutes "matter".