No technically it is the other way around. Just b/c you get your team to a championship does not make you the best player. But Kobe still has that.
A.) Lebron is not the best player of are time. Top 5, yes. number 1, no chance. That would be one MJ.
B.) Kobe is a waaaay better defender than Bron Bron. Not to mention better handles, and much much better jump shooter. Kobe can score at will, either at the hoop or off the dribble. Last time I checked Lebron has not scored 80+ points in a game.
C.) Not taking anything away from Lebron. He is an amazing player. Possible to be the best ever, but he has plenty of work to do for that. Right now he is 2nd best in the NBA and 3rd is not even close to Kobe or Lebron. He is ahead of Kobe for his age, but to say he is the best player in the NBA is wrong.