I mean, back then, who was able to raid the original Naxxramas? Sure, it was released pretty close to The Burning Crusade, but only the best of the best guilds got to try it. That's a thimbleful in a large bucket of players. I never stepped in Naxxramas before Wrath. I never did Black Temple, either, although it was being pugged after the nerfs. Quite obviously, the closest I got to Kil'jaeden was through the cinematic in Magisters' Terrace. These days, I quite enjoy being able to relate to my high end raiding colleagues in WoW Insider.
Of course, most of them have done three drakes, and I haven't. My guild's come close, but when our our brother and sister team of healer and tank get disconnected during the most data intensive part of the encounter... well, it's a taller order for us. But that's besides the point. We get to experience it. We get to enjoy it. Ghostcrawler lays out Blizzard's new philosophy on raiding, and I for one appreciate it. He explains that it takes a lot of resources to produce a raid, and that "it seems an odd choice to lavish all that attention on such a tiny percent of the player base."