The rule is well intentioned but fundamentally flawed. Unfortunately, the NFL is a retread league. Excessive nepotism as well. Look at all the Shanahans, Shotenheimers, and yes, Moras. Lots of guys getting 2nd and 3rd shots as head coach, while new guys don't seem to get even one. Eric Bieniemy is waiting his turn, Doug Pederson and Josh McD just got their second. Too often that negatively impacts black coaches who often aren't part of the network. That said, Flores was hired by the Dolphins.
Not sure what the right answer is. But let's say Bill Belichick retires as coach but stays GM and wants to hire Steve Belichick as HC. He has to interview other guys he knows he isn't going to hire? Why?