Druids - (must be Restoration Druid) Nature's Cure "Cures harmful effects on the friendly target, removing all Magic, Curse, and Poison effects."
Shamans - (must be Restoration Shaman) Purify Spirit "Removes all Curse and Magic effects from a friendly target."
Priests - (I play a Disc AND Holy Priest, both can dispel Magic, don't know about Shadow) Purify "Dispels harmful effects on the target, removing all Magic and Disease effects."
Mass Dispel "Dispels magic in a 15 yard radius, removing all harmful spells from each friendly target and 1 beneficial spell from each enemy target. Affects a maximum of 10 friendly targets and 10 enemy targets. This dispel is potent enough to remove Magic effects that are normally undispellable.
Paladins - (must be Holy Paladin) Cleanse "Cleanses a friendly target, removing all Poison, Disease and Magic effects."
Monks - (must be Mistweaver Monk) Detox "Eliminates ailments from the friendly target, removing all harmful Magic, Poison, and Disease effects."
So the argument of Healers "not being able to dispel Magic", that point is flawed. Moving onto the next part, "I didn't train", what you mean is you didn't put it on your bar because everybody gets their spells automatically now, look in your spellbook. Next point, "it has a CD", yes but the debuff spreads in enough of a timeframe for you to dispel accordingly, the minute you see it on somebody, remove it immediately. You won't have to do so much crazy healing. The debuff lasts for 30 seconds. 30 seconds is a long time when you don't dispel it. You spend so much time Healing, and those with the debuff end up dying. Would just be easier to remove it.
I just don't see the point. For future reference, learn about dispelling, it'll help. Sorry, pet peeve of mine when I'm not the healer during this encounter, it seems that every healer forgets they can dispel that debuff.