The problem with your thinking is Iowa football has much to lose. Take a look at Illinois, Minnesota, Indiana, Rutgers, Maryland in just the Big Ten. How often do they change coaches. After all those coaching changes are their programs at Iowa's level-as a program. How many major bowls have all of those schools collectively played since KF became coach. The answer is, I think, none. How many Division championships have they won since the league adopted divisions. Again, the answer is none. How many have a winning record against Iowa during the Ferentz years? Well, that's a none. I'm guessing none of those programs have winning records against Michigan and Pedo St., as does Iowa during the Ferentz years. How many even Tier 2 bowls have those schools played. The answer is probably none although someone might have snuck into the Cap 1 or Outback Bowl type games.
So, you see we have much to lose, very much to lose. Most HC decisions don't work out. What's the average head coaching career in the BCS level teams? Just the P5 teams. Illinois has had 8 head coaches since KF arrived at Iowa. None left with a winning record, indeed Bielema still has not topped .500 in his brief career.
Here's a very good analogy. I was born way back in nineteen hundred and fifty-nine. Iowa was 5-4 in 59, 8-1 in 60 and 5-4 in 61. Sixty-one was the year I turned two. The next winning record was 1981, when I turned 22. That's when Iowa started hiring new coaches every four or five seasons, and they all sucked until Hayden turned it around in 81.
The Alford and Lickliter experience should be highly instructive for those who said the very same thing about Tom Davis and having nothing to lose. Twenty-three years later and we still have not reached a single Sweet 16 or won a reg season title. I wish we'd won more in the last 60 years but the reality is the record on KF is probably the best Iowa can do in the post-modern sports world. Even if we hit lightning in bottle they won't stay. NIL, TV, streaming and social media and demographic changes cut more against us every year.
Are you really willing to wait a quarter century for the carousel to toss up a keeper, 'cuz you'll be waiting in a desert.