It's one thing to hire a guy like Sean Payton, who'd been a QB coach and an offensive coordinator for two teams (the Giants & the Cowboys) and has had success at both stops.
Garrett hasn't proven anything, other than his offensive juggernaut can collapse at any given moment.
And McDaniels has a LONG way to go and much to show before being a HC candidate.
I was agreeing with your point. Maybe I mis-worded it.