This is such a dumb attitude. If it worked for disc priests, it should be fair game in any guild that doesn't use loot council. If it worked for disc, it would be BiS with the added benefit of being good for a shadow off-spec.
Not every guild is pushing hard for progression. In most guilds loot isn't funnelled to players who happen to play the best dps spec.
Of course, since it actually *doesn't* work for disc, he shouldn't have gotten it.