Some guys just never learn I guess. To me it's just a classic case of a coach outsmarting himself. The 49ers were built on running the ball so Shanahan thought he would "fool" the Chiefs by throwing more. The dumbass still doesn't understand clock management.
Andy Reid was always terrible with clock management as well. He cost his teams plenty over the years. That's why I was shocked when the Chiefs were actually running the ball in the second half against the Titans when they had the lead. Took Andy Reid 20 years to figure out how to salt a game away.