If you read the article, it says having narcissitic traits doesn’t make you a pathological narcissist.
Narcissim is a continuum as are all psychological traits.
Skill at basket ball is a continuum. And some people are notably good at it. Particularly people in the NBA which tend to be way better at it then the general public. And within the NBA, it still makes sense to to try to determine if some players are better at basketball then others. Particularly if you are a involved in a franchise, or even from afar as a sports commentator.
But wait! Basket ball skill is subjective. So who are we to say that NBA star Michael Jordan really plays better than the actor Danny Devito?