Most of the time, there isn't a single correct decision to be made. The choices are between multiple reasonable decisions. You have to make one and live with the consequences.
Pierce, for example, can attest to the fact that over his career he has played through many injuries and been no worse off for it. Yet he look really slow before he rested for his more recent injury.
We are so quick to try to look for someone to blame. Sometimes we need to realize that many decisions will always be essentially a flip of a coin. Sadly, if we were watching a coin-toss competition, 50% of the fans would brag after the event "I told you tails couldn't win!"