The selfishness isn't because he's selfish. His team wants him to be that way. Why? Because if he wasn't, they wouldn't get that far. BUT the downside is, since the rest of the team isn't that great, if Kobe has an off day or gets hurt, Lakers is screwed.
Look at Cleveland, if Lebron was as selfish as Kobe, they would be in much better standing than 2-2 against detroit.
But then again, instead of saying it's ok for Kobe to be selfish, how about the rest of the team gets a little better? =P