It doesn't?
Over those five games, Kevin used 26.5% of the Kings' possessions (FGA + 0.44*FTA), scored 30.2% of the team's points and committed 20% of the team's turnovers.
Over the course of this season, Kobe Bryant has used 27.5% of the Lakers' possessions, scored 29.2% of the team's points, and committed 21.5% of the team's turnovers.
So Kobe, the first superstar-level player I checked, uses more possessions than Kevin did, doesn't score as high of a percentage of his team's points, and turns the ball over more. Seems to be working for the Lakers.
You know, at the moment you start to construct any argument that involves Kevin Martin in comparison to Kobe Bryant you should just check yourself before you even begin.
But as a Kevin partisan, you will not. So I will have to explain the curious gap between stats mongering and real life that afflicts Kevin analysis. In many ways Kevin is the ultimate case of empty stats. Arguments about Kevin's effectiveness are similar to ones comparing Zach Randolph to Tim Duncan, and saying, hey, both 20-10 guys right! Wrong.
Its not really that hard. 1) Kevin does nothing but score. The true stars do everything else as well. Kevin actively hurts his team when not scoring. The true stars are often carrying their teams when not scoring. 2) Kevin makes nobody better. This of course being the x-factor in the offensive stats. He makes nobody better, never has. Not only is he not a good creater, but he scares no other team because they know this, and so he hardly ever draws extra attention. Kobe Bryant scores 30 in the face of constant double teams, which he can and will beat with the pass when he does not just do something ridiculous himself. Kevin scores 30 wihtout drawing much extra attentiona at all. So nobody on the team gets open because of it. On top of which Kevin is not going to very effectively set anybody else up to score. He's not effective off the bounce. So again, nobody else benefits when he has the ball. Kevin's numbers go up, nobody else's do. By his 7th NBA game (the game after the Utah/Deron spanking) Tyrkee Evans was already a bigger benefit to his teammates than Kevin has been in 6 years uin the league. He was already drawing doubles. Already bending the defense. And Steve Nash or not, is a very capable passer able to beat those doubles and hit open shooters.
End result, Kobe scores 30, and there is still room for Pau Gasol to benefit. Lebron scores 30, there is still room for Mo Williams (but it should be noted that Lebron has not been able to get over the top preceisely because of not enough support from teammates -- great as he is, you would be hard pressed to term their offense a great success). Kevin scores 30, and everybody else on the team's offense was actually DEPRESSED. Nobody was shooting even 40%. Nobody else touched the ball, nobody got into a rhtyhm, nobody got open because of Kevin, and because Keivn can't create consistently wiht his own dribble, everybody was spending their time setting screens for him.
You want a stat that could truly explain things for perimeter players, look for something like pts per assist. You cannot have a player scoring 15 times for himself for every 1 time he creates for teammates dominating the ball. It is impossible. It has never ever worked. As in ever. Its why Kevin is a #2/#3 player and not a #1. Somebody who helps others has to be your #1. That assist stat is the absolutely critical yet somehow often unrecognized sign of a true star level player who you can build around. If you look at a Michael Jordan, Clyde Drexler, Kobe Bryant (and note Kobe had to lern about tema before he could win without Shaq), LeBron, Johnson, Roy, Pierce etc. player, they all rack up assists while they score. They all make others better, draw huge attention, and can beat it.