Until we learned they're getting the RR checked off already, I was right there with your logic.
That logic has now been blown up.
Not likely they're moving this quickly, only to have to potentially wait 3 weeks to make a hire, since they can't engage KM until PHI is out.
The tea leaves point to white guys who could be hired in the next few days... so hate to say it, me, but that's Gruden who is just a big personality but hasn't actually achieved anything important for a long time... that's Pete Carroll whose hire, objectively, would seem more likely to just be a bridge to the next guy based on his age... or Jason Witten whose hire, objectively, would seem to require you hire a Pete Carroll to mentor... a very Wade Phillips/Jason Garrett like scenario, then.