Let me start off by saying LeBron has great impact on the game, no one can deny that. However, it isn't because of his box score #s. He manipulates the shyt out of them because of how high is BBIQ is, and the fact he dominates the ball so much:
Nearly 80% of his rebounds are uncontested (a higher percentage than any other player by a significant margin. Conversely only 40% of Draymond's rebounds are uncontested.)
His FG% and points are propped up by scoring in transition and being able to be more selective with his shot
His high assists are due to the fact he handles the ball more than any other player in the series (time of possession: LeBron - 7.9 minutes per game, Irving - 6.2 minutes per game, Curry - 5.2 minutes per game, Durant - 3.6 minutes per game)
To expand on that, when he's dominating the ball he can pick and choose when to score (if it's an easy opportunity) or to pass (when he can't score, and get an assist in the process) more than any other player. If you have your hands on the ball more than any other player you increase your chances of putting up greater box score numbers.
What about his turnovers?
What about his inconsistent, at times horrible defense where he just lets players drive past him? Just because that doesn't show up in the box score why does it make it less important?
When he's been the primary defender, GS is shooting 64% against him (obviously context needs to be applied) -
Why does everything in the box score have more importance than things that aren't recorded in the box score - things that have greater impact on the game? Why do we automatically assume a player is better or performing better because their box score looks better?