I remember when Mike McDaniel was becoming a hot name in the head coaching sphere, it was said that he would not coach for a team located in a state without legalized recreational cannabis. He then got hired by the Dolphins. Point being that there could be any number of reasons why Ben Johnson decided this wasn’t a destination he would like. And as far as I have heard, the Saints FO didn’t even request to interview him, so speculating on it is pretty pointless.