A major problem "lesser mortals" have is this massive inferiority complex where you think progression raiders have some kind of god-given gift you lack. There really isn't that big a difference between you and them. I'm personally not even an awesome raider, I'd characterise myself as "pretty good". Tendency to get lazy and die to stupid things :P
In my raid group there were people who pulled amazing DPS sure, I don't even know how some of them did it. But that wasn't what got us through content - not even in HMs. Really 99% of raiding is teamwork, practice and determination. Really ridiculous amounts of determination. If you had 100 wipes on a boss per week you'd down it too.
In fact I remember we were stuck on HM Spine for absolutely forever back in DS progression. If you remember, the big thing was getting enough burst into the tendons each phase to lift the plates. Now one of our other players was a Rogue who could thrash me in the meters with one hand behind his back - and I was further up the legendary chain than he was! He was one of those guys who's obsessed with ranks and would get serious world ranks on WoL. Needless to say he was doing a massive amount of damage on those tendons, had all his CDs and procs planned out perfectly. But when we finally got that fight down, it was on a night when he wasn't there. Because our problem actually wasn't that we lacked amazing DPS like he could do, it was that our ranged team was sloppy on breaking the grips. We just improved our teamwork and coordination, broke grips better and wham, it was down. If ever there was a fight that depended on DPS that was it, but actually the real thing holding us back wasn't anything elitist at all. We downed that boss with LESS DPS than the previous weeks.
Anyway, moral of the story is, raiding isn't about being god's gift to recount. Not unless you're in Paragon/Method/etc and trying to beat everything on heroic in the first week. And even those guilds REALLY beat bosses by gluing themselves to their computers 24/7 until it's dead.
P.S. Personal note: I only raided in progression raiding groups for 3 tiers myself. Before that I played casually, was in guilds with IRL friends or in-game friends and just did NMs if anything. A week or so after HoF came out I quit due to the huge time investment taking a toll on my outside life and other game-playing. I've seen WoW from a casual end as well as a "high" end. Gotta say I prefer the casual end... if only playing with friends didn't have nightmarish logistical/attendance issues :P