Originally Posted by
coredumperror
As a raider, hardcore or not, you have to get a group of at least 10 people together who are good enough to actually *succeed* in killing raid bosses. Then, even if you kill that boss, you're not guaranteed to get the item you want, because of random drop tables. Then you also have to consider the 1-week lockout on all raids (except ZA), preventing even the amazingly good raiders, who can clear BT/Hyjal in 2-3 days, from getting any more gear per week than a single clear allows. So raiders put in time to:
1) organize a large group of people
2) teach them, through experience, to succeed in killing raid bosses
3) do it over and over each week until every person has gotten most of the gear they want
4) move on to higher level content, repeat from step 2 (or 1, if your guild has unstable membership).