That is the funny thing though. People have a lot of misconceptions of WoW, not to mention other games that they haven't really played all that much. I have a friend that has been playing WoW since the beginning and he doesn't use addons at all. His UI is on default setting, except for all the hotbars that have all his abilities. He could care less about the addons and is an insanely great healer. Blows me away at how he does with the way the UI is set up.

Certain addons are only mandatory if you allow them to be. Simple as that.