Oh for heaven sake, this is getting silly.
"A Mage that can't heal is not a Mage". I guess that Merrill and Morrigan who I never specced into healing are not mages? I can bring down a storm of fire, summon the dead, freeze my enemies, suck their life force, make my friends fight faster, protect them with invisible barriers, make their blows hit harder and strike fear and confusion into their targets with a wave of my staff, but because I can't rub a bruise better I am "not a mage" and the class is "broken".
/facepalm
Please re-read my post. I said "Mage who can not leran Healing Spell is not a MAGE!!! (can't learn / decide not to learn is very different thing)"
If mage not learn healing spell that is up to him/her. But Healing spell should available to learn.
And yes, IF DAI haven't healing spell at all. They should have some explanation in game. Why Mage suddenly stop use healing spell? Maybe because of the rift impact cause the lock to healing spell or If mage use healing spell the rift will explode/expand or something that make sense.