I've never really got this. Ron Edwards analysis of purist-for-system RPGing is brilliant - as a 19-year RM devotee far more insightful than anything to be found on the ICE messageboards! Likewise his analysis of 4e D&D, all the more remarkable for being written about 5 years before the game was published! He also explains other games I've loved really well - CoC, RQ, Prince Valiant, even - I would say - AD&D. I have never felt patronised or insulted: he takes my games and (by implication) my play seriously. And helps me better understand my own engagement with them.
Sure. And to employ the apocryphal Pauline Kael quote, "I don't know how Richard Nixon won. No one I know voted for him." I, too, don't understand how people could think differently than I do- yet they keep making new variants of elves, don't they?
It's a feature, not a bug, Some people believe that Derrida helps them understand things in way so profound, they can't help but push a copy of his work with one hand while a lit Gauloises dangles from the other, while others think he is a pile rancid brie atop a stale baguette. To each their own.