But when no one's watching...
You don't need such complexity to simulate on the scales no one is observing. A coin is flipped. It's not needed to compute the twenty quadrillion underlying interactions if all that will be observed and recorded is if it's heads or tails.
The simulation outputs are for the observers, and they can be comfortably oblivious of 99%+ of anything not observed. What game designer simulates every drop of the unseen fountain two towns over?
Biting the hand that feeds IT
