Because it will disturb the All-Star week. Right now the last game before the ASG is Saturday and Sunday, one day after, it comes to the votes for those players who will play there or will shoot for the 3 points shot contest. Being a scrimmage Tuesday will bring the possibility that some players to injury and not be voted anymore. Of course, the votes will be not Sunday anymore, but Wednesday when already need to be played the ASG!
Injured players still play in ASG don't they? I think I have came across such a situation before.
That said, I think adding a third game would be inline with how BB is working to cut down on short rosters. Yea I mean current a 7 man roster is not considered a short roster, but in professional leagues, people only do that in the playoffs. Over here, it's done all year long. With the ASG being held midseason, it actually discourages people to have anything beyond 8 players - because anything more and you risk having a player with worse optimal game shape. To make matters worse - fatigue sets in for older players. Hence I can't just play two lineups for 48 minutes in the week to have all 10 of my regulars get good game shape. If this isn't the BBs shooting themselves in the foot, idk what it is.