I don’t understand the point you are trying to make. Frankly, I am not sure you even know what point you’re trying to make.
You are essentially arguing with yourself. No one that I am aware of thinks Kirk has “lost most of what he knows about football.” To be honest, I think many Iowa fans would be happy if he did forget most of what he knows about football as it relates to offense.
Regardless, this is silly. Iowa has had stellar defenses and special teams and an atrocious offense from 2021 on. Kirk unapologetically put all of his chips on his unqualified son and the result was the Iowa offense became a national punchline and statistically about the worst in college football. Somehow, someway, Iowa racked up a bunch of yawn-inducing wins over teams like NW, Nebraska, etc. DESPITE their anemic offense. In turn, every time they played a legitimate top 25 team, they got embarrassed.
What is so hard to figure out?