If had the players i would play look inside like this: 2 point guards as PG and SG AND their passing/handling skills higher than jump shoot. At least this makes all the sense. In real basket, a player which better skill is jump shot will try to hit the basket more often than to find a team mate for a clear shoot. And the inverse also applies. I think this is the reason why you see your guards shooting more than your inside men in as inside tactic.
teams have chosen to create players who can defend the paint but who are hopeless outside of it (i.e., a typical top division center might be around tremendous ID but pitiful PD). If the other team insists upon playing two such players defensively, then a team with 5 jump shooters will have a major advantage, because the defense can't cover them all