Because the pic in the OP is comparing career TOTALS not AVERAGES so you're giving Lebron 3 more seasons of numbers to add on.
Your argument is that he's somehow entitled to the advantage since he came straight from high school because he was that good.
That has nothing to do with making an fair comparison. Especially since this way it adds the titles he won in the last 2 years. I shouldn't have to explain why having more years in the league put him in the position so win those.
That being said Lebrons numbers would still be better