I don't see the claim that Lebron James is not impressive, but I have no problem with imagining someone having little idea of who he is. Besides, he's nothing compared to Michael Jordan and if you don't know about him then you're just not alive.
He's about to be. He just signed a lifetime deal with Nike[0] which will undoubtedly make him a billionaire, in a similar vein to what Jordan did with the "Air Jordan" brand.