more quests for healers?

Reading What Makes the Healer Class Unpopular? it occurred to me that most questing/leveling activity in WoW involves going out and killing stuff (and of course you can't kill a mob by healing), and very little involves standing your ground against waves of attackers, supporting the defenders, and surviving.

All that comes to mind is a Netherwing daily, defending Sergeant Bly, counterattack against centaurs in the barrens, and an epic priest quest. Add Torek's Assault for a twist on the theme. Surely there are more?

Additionally, why couldn't healers also travel the land seeking out sick and the frail NPCs, and gain some XP for healing them? Also, surely it would be a more interesting world if various nasties were to come bounding over the hill and attack some unlucky NPC farmer or traveling merchant. Sometimes the NPC will fall and die, sometimes they will prevail but with great wounds or lingering pestilence .. both opportunities for a passing healer to ply their craft.

The basic paradigm of WoW seems to be find, kill, loot, repeat, with the occasional fedex quest designed to move you on to new areas. It could be a richer and more interesting game with a different underlying paradigm.

Now, if class specific quests were to be provided during the leveling process, then there's a good chance that some of them would quite simply be skipped which would be a shame. They could also be provided as daily quests though, which would provide repeated opportunities for players to hone their skills.