Playing offense is fun...playing defense is hard work...little instant gratification, not as easy to identify who is actually doing it right...
Playing against a team that doesn't "do defense" is fun, a day off, lots of shots.
Playing against a team that loves to play tight, team, fundamental defense is a long game of work and frustration. It becomes a battle of wills.
Most often, opponents have a day off when they play Iowa...fun, up and down, work on some threes...wait for Iowa to start grabbing, getting lazy, and enjoy their turnovers.
The players don't hold the other players accountable for poor defense, the coaches don't either.
It isn't that complicated...