Because I don't believe that it's the personnel who are failing to do their jobs. They are being put in a position to fail. Whether that's due strictly to scheme failure or execution or players not being suited to what's being asked of them, it is Morris who is employing the approach. You say it isn't "his" scheme" but that's disingenuous. He is the DC. Whether he invented it or was asked to emulate someone else, he signed off on it. It's his responsibility now.
You want to get wrapped up in semantics and ignore the reality. This defense has been soft and passive all year. Use whatever labels you want. If they employ the same approach, Murray and the Cardinals will tear them apart. Again. With this regime, they obviously cannot use the same approach as last year.