Defense. You can't beat the Suns without defense.
What does this have to do with Kobe getting his teammates involved? It's simple, if you watch the games you know that the Lakers as a team play their best defense when they have it going offensively. How do the Lakers get it going offensively? By Kobe Bryant distributing the ball and getting others involved. Phil and Kobe both know the only way to get the rest of the team to keep their head in the game and play defense was to put points on that board, if they're just standing around watching Kobe do what he does that would do nothing for their confidence and in turn would do nothing for team defense, which again is the key to beating the Suns (atleast for the Lakers, since they don't have enough offensive talent to hang with them.)
"Love me, Feed me, Never leave me" --The one and only Garfield