I agree, but healers should be considered players too, you know
If a DPS dies in a dungeon, for example they don't know the mechanics or they just stand in them to maximise their damage, there's the expectation that they will be instantly resurrected by the healer, continue playing and having fun. If the healer dies, however, even in the beginning of a boss fight - they are expected to stay dead and wait for the Warrior and the DPS to finish the boss on their own.. I know that DPS players do a lot of waiting and idling while queueing, but is that a reason to punish healers?
Jokes aside, resurrections don't make you feel special or that you are carrying your team to victory, since they have no cooldown. If they had a long cooldown (4-5 minutes), it'd make them more important and rewarding, as you'd have to plan who and when to res... like LB3! It would feel like "playing God" when you res, and not a chore that you have to do when party members die.