By the way, are you sure there ain't some sort of bug with the 3-2 against look inside? These two are from today, but I have seen too many alike. (17504667), (17504577).
I can understand that the 3-2 zone forces more TO, but the shooting percentage should definitely be higher.
In both matches that you quoted, the offensive flow of the team playing look inside was only inept. I think that is the source of the problem that you are describing. I noted that the players who should have had high shooting percentages (the PF and the C) both had shooting percentages around 50%, which is pretty good. The issue was that the guards took most of the shots, and they had really bad shooting percentages.
The moral of the story is: get a bettter offensive flow.
Run of the Mill Canadian Manager