Yeah I would agree but the thing with most coaches is they all think they are the guy that will get it turned around. Even at a school with that history.I think someone at his age would want to make sure it was the right job so he could have some longevity in his career. Going to KU and flaming out like other coaches could be bad news for him for the rest of his career.
That and with has been stated above guessing he will get a contract with quite a few years at very good money. Not easy just to turn that life-changing/family set for future situation down.