Seriously, people overrate individual defense today. With the no grabbing rule, no one plays shut down defense. There are a handful of guys who play great/good defense in the NBA. Do you think Seth Curry defends well? James Harden? Carmelo? Dirk? Korver? In the NBA it is more about schemes and team defense. Yes there are guys like Noah but even Paul George gets abused sometimes. McDermott isn't a walking stiff, he has athleticism and he plays hard. Do I want him defending the go to guy, no but is there any guy on the Jazz who is going to shut down Dirk, James, Durrant, etc.
The Jazz need to have defensive system implemented and then teach good team defense. Watch the Spurs they play very good team defense. There is no way the Jazz get McDermott unless they move back in the draft but I think he is being underrated because he can make shots which is just as or more important in some cases than defense.