This is not auto healing. This is dependence on addons and not being able to heal properly without them. I agree with you that is a bad thing. I myself use mouseover macro's, which are provided in-game by Blizzard and the in-game raidframes. If any of my addons break it won't be gamebreaking for me. I can still heal and dispell properly. Healbot and Clique are addons I don't use personally. Like you stated, once you are used to the mouse clicks and the addon breaks for whatever reason (new patch, changes in api etc.) you are have a problem.