Ah, but that's the interesting thing.... I didn't care about any of that, beyond the story and architecture (Bliz has always made such interesting looking places).... the only motivation I ever had towards raids was being able to see the story & art assets that my subscription fees were funding. Of course, I also didn't care much about the loot. So the random thought I periodically had back when I played was wishing that, perhaps for the previous/outdated tiers of raids, they'd make a "sightseer" setting. Just the story. No loot, no monsters, etc. (Of course, then I always realize that part of the story bits are woven into/around the boss fights, so without the enemies, you couldn't actually get it. Ah, well.)
It was just always a bit disappointing that I'd get to experience 90% of the story in each expansion (the questing in each zone while leveling), but then be locked out of the climix/resolution because it was stuck behind a gameplay experience I had zero interest in.
I stopped playing before the modern LFR era, but I doubt that it would have appealed to me. No matter how "easy mode" they made it, it would still be the "herd a bunch of people through boss fights" thing that just doesn't sound fun.
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And this is another big issue. Like "immersion" and several other frequently-used gaming terms, "casual" and "hardcoe" mean different things to different people/groups. To the Industry, "casual" gamers means one thing. To MMO raiding elitsts, it means another. To PVPers, another. Etc, etc, etc.
I've been gaming pretty steadily for 35 years now. It's one of my primary hobbies. I spend a lot of time on it, enjoy it a lot, read news sites about it, etc. I don't pursue the hardest challenges, raid or pvp in MMOs, care what other people's builds or gearscore are, almost never play on a difficulty beyond "Normal", rarely watch video guides to learn The Best Strategy?.... by your definition, I'm hardcoe. In the "h4rdc0r3 d00dz" view, I'm casual as hell. To the industry, I'm probably just an average customer.