a) KG's already got a house there and is friends with Kobe b) they have the most talented player in basketball... c) even with a slew of injuries, the Lakers still managed to win 42 games in the West as opposed to the Celts who couldn't even sniff the playoffs in the East... d) Phil Jackson e) they're the Lakers - stuff just always seems to work out for them darnit!
On the other hand, Kobe himself would prefer to play in Phoenix.