463 might be enough for first boss - but its not for the entire instance. And considering:
1) the RNG on the drops for 10 mans (many items might be dropping for specs not in raid)
2) the very low number of bosses until guilds hit dps/hps blockage.
3) the must for a perfect setup in terms of buffs because thats what the bosses are balanced on. (this does not always work in 10 man more casual guilds that are now sitting out of normals cause right specs and classes are not loging on.)
This will ALWAYS lead to it beeing mandatory to use other means to get any upgrades. If not - the person is either just stupid. Or is, what we called in vanilla - just a leech.
mandatory, adjective; required by law
Now stop pretending that anything pixel related is mandatory.
Also Primus, did it completely go over your head everytime people pointed out that hunters can give spell haste, they can give ALL the majors buffs. Go back and check the link I gave.
Well - Many guilds look at it as a MANDATORY to run LFR -meaning they will not allow anyone into a raid that is not trying to get the best gear possible to keep the guild progressing. When a game developer designs any system that creates such an obvious and mandatory progression system (note GUILDS set the rules - not BLizzard in this case) - then Blizzard can not and should not act like its not a mandatory thing to do.