There is a reason why Blizzard recently made some modifications to how addons affect resources. It is fine. Addons simply change the UI but the player still has to make decisions based on what is shown on the UI. Addons don't play the game for you so please just stop. Most people who shun addons in general seem to know the least about them and sure as hell don't understand what they do or how they work or their place in the game.
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What? The default UI has changed significantly since release. Blizzard is constantly adding addon features to it but still the fact remains the reason why we have them is because Blizzard wants us to be able to change our UI rather than being restricted to the default. Again its fine and no addons don't play the game for you.
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Addons don't make you hardcore. It is just text files for gods sake.
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And someone from the "shouldn't have to" crowd appears right on schedule. Here is the thing: yes you do have to use addons if you want to change your UI that is the entire point of allowing them. There is not one single legitimate argument against Blizzard allowing the community to change the UI to their hearts content as long as it abides by the terms of use.