@Bad Gopher I think you're apply too much of a college perspective here, which is obviously easy for us to do with Fleck.
These are (mostly) not 18-21 year olds, they're grown men. They don't need, and would probably reject, a big sweeping "culture" (all the stuff not having to do with football).
We don't need a salesman to sell the program to recruits/portal guys. The GM handles all that and it mostly comes down to money and playing time situation (and scheme, etc.).
In the NFL, I think the tactics and schematics of the game itself matters far, far more. You pick a scheme/identity, you try to get the best players who can play that scheme well, and you look at/gameplan for matchups with your guys in your scheme vs the other team's guys in their scheme.
In college, recruiting and developing talent is such a huge part of it, and can genuine account for a good chunk of wins where you simply out-talent the other team. You mostly can't do that in the NFL.
At the end of the day, if you win, you win. I don't care if you mumble and stumble at the media podium. Who cares. If you lose, it doesn't matter what you say or how well you say it.
In the NFL, I think it's a good thing for the HC to be a coordinator. My opinion.