I just don't get the "defense is bad" thing, in that if you are marginally athletic, AND you put in the EFFORT, then you should be a decent defender.
I know it's a very different level, but when I played daily pickup games at work (had a nice indoor gym) I was probably the least athletic guy there, but I could guard most of the guys there (most of whom were better than me), because I put in effort on defense. And if I knew I couldn't stay in front of you with the ball, then I guarded you so close without the ball or took away the entry pass angles so that it didn't get passed to you. Now I know at the college level it's 1000 times better play, but conceptually it's the same game. Defense and rebounding are primarily EFFORT.