The other thing about All-Star game defense is that both sides are fielding an entire team of guys who see double-teams every night - some of them, like LeBron, on almost every play - and still average 1.5 points per shot. Even if both teams cracked down and played hard-nosed defense to the best of their abilities for four quarters (something the vast majority of NBA teams only do in the Playoffs anyway), the game would still be in the 120-119 range, if not higher, because even a perfect defensive possession will still cough up points a significant majority of the time. Basketball is the opposite of Exalted (and football): perfect defenses can't stop perfect attacks.
Not to mention that the All-Star game rarely features exceptional defensive players to go up against its exceptional offensive players. Really, really good defensive players at the NBA level aren't the ones who rack up tons of steals and blocks, they're the ones that influence opponents' spacing and shot selection with physical (usually read: dirty) play and encyclopedic knowledge of the game. Those guys don't make the All-Star teams and they're the only ones who have even a chance of limiting the effectiveness of guys like LeBron, Dirk, Carmelo or Wade.