You got to wonder if Adelman let them have too much freedom as players...
It is like school, you love to havea fun teacher who lets you get away with murder, but you try harder with the teacher that is really tough. You also respect him more. It's just the way it was with me.
Rick has about 600 more wins and a dozen playoff appearances over Muss that say differently.
I notice that people always seem to approach this issue based on their own personality -- if they are somebody who craves discipline, would for instance respond positively to a yelling coach, drill sergeant, or taskmaster type personally, they always make the above argument and assume the rest of the world works the same way. If they are somebody like myself who once was almost kicked off his football team for threatening to kill his offensive coordinator because he got in my face, and who would likely be dishonorably discharged from the military for dressing down his drill sergeant in front of the rest of the troops while explaining to him all the ways his bullying was a pathetic attempt to compensate for his inadequate manhood, the assumption is the opposite. I would lay it all on the line for the "lax" coach who showed me respect to justify that trust + reward him for it, and work actively to humiliate and undermine the taskmaster and give him a little wink as he was cleaning out his office. I think its all leader/follower/alpha/good soldier/independent rebel behavior, whatever.
In any case the truth is surely somewhere in between -- different people, and players, I'm sure respond better to different leadership styles. There is no universal "better". But, that said, the NBA is NOT a normal cross section of personality types. Highly unbalanced to alpha types. Stubborn elite men with huge egos. And if you squeeze those types, there is going to be friction.