Neither of them prove anything, though.
Whaley - "Here's a list of coaches I think we could hire. It includes Bevell, Gase, Quinn, Reich, Shanahan, Shurmur, Jackson, Ryan, Kyle Shanahan, Schwartz, Roman, and Austin."
Pegula - "We're hiring Ryan."
Newspaper headline - WHALEY INFLUENCES PEGULA TO HIRE REX
See how that proves/means nothing?
The fact that they couldn't convince Polian to come on board does not automatically mean they now trust Whaley more. It only shows that at one point, they sure as hell didn't trust him enough to run the team.
Maybe they trust him now more because he was against the Ryan hire and he's being proven right.
What were the terms of his extension? Anyone know? Maybe it's a team friendly extension that has protections if they don't make the playoffs. Just a theory, though. Rarely do teams like to let their coach/GM work on a 1 year deal. Extending them provides insurance on the chance that the Bills have a successful year and Whaley holds them ransom for a ton of money to stay. That's just business.