I think you are still missing the point. It isn't a direct relation because Iowa would be firing Ferentz and Bielema left to take a new job, those are completely different scenarios.
However, Wisconsin is struggling to replace their head coach. They aren't fooling anyone Utah State's coach wasn't their # 1 choice, he was the # 1 to say yes.
Anyway, back the point at hand which is if Iowa forces Ferentz out, they could also struggle to get a top end coach and have to settle for someone unproven that the BCS level.
Maybe he will succeed, maybe he won't, that is the point of the phrase "The grass isn't always greener on the other side."