let's pretend that hand checking is still allowed and the NBA wasn't calling the game differently during 90s
Having hand checking in the 80's and early 90's didnt lead to a better defensive environment or teams overall. The 80's was a joke defensively, they were just more phsyical.
The 08' celtics(a top 3-5 defensive team of all time) was post The rule changes
And they were extremely physical in the finals
[ame="http://m.youtube.com/watch?v=nepmd2ygMK4"]YouTube - 2008 NBA FINALS: Kobe Bryant vs. Boston Celtics Zone Defense[/ame]