There is a difference between trying and trying your best, playing your hardest. The Spurs were even better playing half-assed and out of their game. It came down to the fact that the Spurs were about as aggressive as a middle school girls team. They lacked the edge, the "if you hit me, I'm hitting back harder" mentality they needed. With the exception of game 4, all of these games were close and of the Spurs had the balls to hit back and turn those tick-tac foul calls into "don't come near the rim" fouls then the Spurs would have won in 5.
That is my number 1 gripe with the NBA today. It's too clean. People think "cheap shots" and fights shouldn't allowed. Basketball is a contact sport. Not one player from the 60s-80s could play in today's NBA because the refs would foul them out or eject them in minutes. It's a damn shame that the way Memphis plays is "physical."