Well...
1 - That's not an argument. That's an opinion

I'm not advocating for anything. To you, the game doesn't need to have difficulty to be enjoyable. Well, I don't like Savage but I'm comfortable with the examples I listed. Does it mean that just because I want something a bit more complex, I need to start getting into Savage and EXes? Advocating for something extra doesn't imply the deletion of whatever there is right now. If anything, I'd say I want there to be more of such content, rather than it being so one-sided on either end. There is no spectrum half the time. I often need to wait and be surprised that complex content exists rather than knowing it's coming.
2 - I'd like the game to have more content like the one I described, but I understand why they don't do it. Amarande says it best: MMOs don't respect working adults, who already have to spend their energy daily and don't want to come home to a tryhardy game. Just because I'm fine with that doesn't mean that it's the best approach. And the approach they have does seem to work, since it's one of the reasons the game is so popular.
3 - Savage and EX's aren't the same as CLL or Orbonne Monastery. Like, at all.
Edit: Also, just to clarify. I mostly wrote that in response to VelKallor's post which was directed at raiders.
It's kind of why I prefaced it with "I don't raid, I'm in the casual crowd, but I prefer the harder content". Because it's not just a matter of raiders disliking casual content, it's that there are casual players who do prefer the harder type of content. But they are not the only ones, and I daresay I'm probably in a minority. People who prefer the easier type of content likely vastly outnumber me.
And I have no problem with that.