Fazal, I haven't said that defence isn't necessary. Please read my previous posts (First/2nd) if you have time.
I don't want to get into arguments when it is specific to NBA, as I have said before also, I am not a very regular follower of NBA. What I said about Basketball is generic, not specific to any league/tournament. My sole point is, scores determine a winner & scoring is the result of an attack. Just see the stats of any match, How many attacks are foiled and how many shots are attempted by a team. You will get the answer.
May be you are right about NBA, As you know better than me.