Koji was not even the closer when the season started and no one in this planet saw his performance coming, not even the most optimistic. David Ortiz posted a ridiculous OPS specially in PO. Lackey came from hell. Lester was a stud specially in PO. Etc.
I mean, everything was so perfect. If you try to do it again 1 million times in the middle of 3 disaster years, the probabilities are close to zero since those years will suggest you that a good plan is not in effect... reason why I call it fluke.