Add ons do not make a bad player a good player, or a good player a great player, all add ons do is make it easier for people. I personally don't use DBM or any other mods like that, but I don't begrudge people that do, I do use alot of addons to keep track of things, or do things that I could make a macro for, like announce when I shield wall, etc. I just find add ons are a great way to help manage certain aspects of the game some what easier and lets you make your UI more customizable. In essence I do not think the the lack of add ons or the use of many add ons really matters with skill level, people with dbm still die in fire, they are just bad.