Oh how sweet. You actually think that "pro raiders" are what made this game big? I hope i won't shatter your world, but affordable broadband internet and a casual-MMO ,that WoW always have been, being available at the same time is what made this game big. It didn't get big because of only 10-20% of all players raiding, it got big EVEN THOUGH only a tiny fraction got to see all the content.
Blizzard seems to have a different opinion on what they find immersive for the players then you do. They have shown that many times, ask the people that would've love to fly at the expansion.