I see what you are saying, and that is where MEM gets credit, but it wasn't all on them. The Spurs could have quite easily done things better that MEM couldn't control. The Spurs hurt themselves every bit as much as MEM did.
I am not saying the Spurs weren't mentally weak and that the Grizz did not deserve to win. I am saying, that despite how well MEM played and despite all the things they took away from the Spurs, the Spurs shot themselves in the foot numerous times and could have (which I know didn't happen) and most importantly SHOULD have won.
Spurs just flat out choked and couldn't survive it because of how well MEM played.