All Polian is saying is that he doesn't feel he is really the right guy for this job. Taking him at his word, that's actually a good thing.
The Marv Levy hire wasn't all that long ago. Marv agreed, as a personal favor to Ralph, to come in and do some feather dusting for a couple years when the place needed renovation.
Buddy Nix was another throwback to the glory days and he ran out of gas as well.
How many years has the franchise been set back with hiring tired, familiar faces from the 80s and 90s?