1) They are. LeBron also had a huge scoring night vs the Knicks last season. Wasn't it like 54 pts, 10 rebs, 11 assists? Kobe's night was like 61 pts, 0 rebs, 1 assists type of thing.
2) They don't take as many shots as Kobe does. LeBron and Wade and Carmelo etc all share the rock a ton more. Kobe has 'tunnel vision' and it's like he says "OK THIS GAME IM GOING TO BE A BALL HOG, LET ME OIL UP MY ELBOWS CAUSE IM GONNA JACK EM UP ALL NIGHT" Look at the shots. All of those players are more efficient FG% than Bryant. That means if they had the same amount of shots, they'd have a ton of points too.
3) and LeBron, Wade, Carmelo, etc don't shoot as many 3 pointers.