Good defense also doesn’t mean going balls to the wall for thirty seconds for every one of your opponents’ 100 possessions if it comes at the expense of doing what you do best.
You know there is a fairly wide chasm between balls to the wall for 30 seconds on 100 straight possessions and allowing your opponent to waltz down the court and through the lane for easy buckets. Iowa would have to improve by light years to play "good defense". How about getting to "not terrible" as a first step.