In his career had to have taught defense at some point. However, for some reason, defense has not been a priority for this team. You would hope that over the offseason (because at this point, the light isn't going to be turrned on now), those who are defensive culprits will take the time to learn how to defend their positions more effectively.
But most importantly, they have to want to play defense. Maybe because they were scoring stars in high school, they didn't need to play defense because it was high school competition and they could get by with just scoring. But one year into their B10 career, hopefully it will hit them that defense is just as crucial. I can't contemplate why they don't think that now and at least put forth a modicum of effort.
But maybe they need defensive anuerysms. Stauskas and Robinson won't turn into Novak and Stu overnight. But at some point, the light better come on or we'll be stagnant.