Great coaches make a difference. Really simple point actually.
Add Harbaugh with the 49ers. Alex Smith is now a top QB. He was going to be on the waiver wire before Harbaugh came on the scene. Now they are going to win their division in all likelihood. Stanford was down before Harbaugh came on the scene. LSU and Bama were down before Saban. Arkansas was down before Petrino. USCe was cannon fodder before Spurrier. Etc., etc.
Point well taken as it applies closer to home - even if the OP backed off his original statement.