Actually it´s no surprise to me that the engine has a completly different opinion who the best player on my team is. XD
Everytime when I build my offense around a certain missmatch, I´m wondering why this missmatch wasn´t abused by my team as I planned.
After reading the game manual and few forums I would try to explain it like this:
Your first few possesions in the offense goes over your inside players. As this strategy leads to several points, the opponent coach will set his defense to an inside focus. Therefore your PF and C get double/triple teamed as soon as they touch the ball.
This creates space for your other players, which suddenly have a nice less contestet shots. The better the looks, the more likely a player will take them. Your SG and SF seem to be quite experienced (I guess min. 5-6), therefore their shot were probably quite good.
Nice weekend and nice new years eve.