Oh, I don't doubt or deny that it's a big part of basketball; I was just trying to explain the problems one encounters with mocap and trying to put that data onto a character in the game.
Retargetting is a very difficult problem to solve, particularly in real-time with multiple players. Regardless of solution, it would require immense programmer effort, and unless the producers decide to make it a priority there are other things to worry about. Like throwback socks.