Well there is one important point here:
The legend of Greg Popovich has risen to such a level that for a minute you have to take this seriously.
Anyone who doubts that Greg Pop is the best coach in the NBA, think about that. Would we even consider for a second that Doc Rivers would withold an inbounds play that is a potential game winner against a western conference opponent in January because of the off chance that you'll see them in the finals? No freakin way. Phil Jackson wouldn't do that, Jerry Sloan wouldn't do that, heck Pat Riley wouldn't do that...but Greg Popovich might.
Here's the thing. If Popovic was as good as everyone says he is (even though the hype is quiet, it is strong), he would have won a championship in the last 4 years.
At some point, I think it needs to be acknowledged that he won those championships with the best player in the game, and probably the best PF in the history of the league in the absolute prime of his career, and one of the most complete supporting casts we have seen in the last 20 years...yet he has not done anything with them since Duncan has started to go downhill.
Now, don't get me wrong, I am not saying Popovic is not a great coach, but at some point, the genius tag needs to be supported by current evidence.
Also, I want to point out, that the Spurs are a great example of how drastically limiting minutes of your stars does nothing to keep them off the injured list at critical times.