The best example? Troy Murphy is a much better player than a scrub like Josh Boone. Unfortunately, he's not that good either. He's mediocre, and it's illustrated by his being on a 30-something win team practically every year he's been in the league.
In the NBA you either need to be really good or really bad. You don't want to be the "best" bad team (i.e. 13th pick in the draft), which is kind of where guys like Murphy lead you every year.