Can't really agree with a lot of this.
While Callahan did take them to the 2002 SB, the 2003 season was an unmitigated disaster. He lost the locker room which was ready to mutiny against him and ended up being fired. The "dumbest team in America" comment will never be forgotten. He was a desperation hire by Pederson after every other coach he contacted turned us down.
Bo was a hot commodity as a DC but had zero HC experience. And even though it ended up working out pretty well I wouldn't consider him a top pick when compared to others coaches with previous HC experience.