There is no contradiction, and I didn't call anyone a scrub inparticular. The spectrum is not about how people behave socially, it's about the level of work they put into something they care about to get the most out of it. The fact that a ton of social stereotypes come into it at all happens to be pure coincidence, so I included them here.
The hardcore is the hard worker who puts time into his game and learns as much about it as he can. He wants to become as good as he possibly can be at his game. He cares about the game (as in the sport). He may or may not care about art and story assets that surround it.
The scrub wants to pretend he is awesome at the game and will act knowledgeable but does not want to do the work for it that the hardcore player would do. He cannot accept his shortcomings, especially when beaten. He will also insult those that are superior to him, while maintaining his stature of posing himself to be better than the casual.
The casual does not care about "the game", they care about using it as a social diving board to write stories, draw pictures and talk about things which more often than not have nothing to even do with the games continuity itself.
It's very easy to see how the scrub fits into the middle of all things, both in the amount of effort they put in and the social aspect. The scrub is delusional on many fronts.
Are you a scrub, Awesmic? No, I don't think so. You've done the work necessary to learn the game better. You didn't go about it quite the same way as most people did, but you did the work your own way and you did not become trapped in a maze of delusions like a scrub would.
The story, art, music, etc is there to support the foundation of the game. It exists as a small attachment to every little part of the game to make it feel a little more substantial so we can more easily form an emotional connection to the game. Liking these things for the sake of liking them is fine, that in itself doesn't make you more casual or hardcore. Nobody ever said we couldn't like it. it's irrelevant to the game itself as a sport though, so it has to be treated in that manner.