People have their own opinions and I know I am way too opinionated into pushing limits, that's just how I roll: play to have fun, challenges are my type of fun and my fun lies within raiding at higher level in this game. If raiding is that easy, I would have quit this game since ages ago but ultimately I came back after having twice resubbing after hiatus.
The game can stay where it is now and it still will be a game for all kinds of audience for all I care. People seem to have the wrong notion about raiding is all. When you are raiding, you are expected to do more than what you normally do. How do you know if what you are doing is good enough to clear? By getting into raiding and test it out then you get exposed to these experiences, and it's only natural that people want to improve but at what cost? Effort is needed when you are trying to improve, you don't just suddenly get so good from the start, that's just not have it works. Some of the new raiders are constantly improving and that's great.
Who knows what kind of meta SE is going to have us adapt to? All I know is I will try to be more and more optimized, be it offensively or defensively (even if tanks become truly tank and not just secondary DPS), or even both just like what I have been doing so far. That's why living beings are so great, right? Adapting that is.
I didn't mention anything about being world-first materials, you are adding your own thoughts into this. What I meant was that each group has different expectation, be it raiding at high level or casually, just wanting to get gear or beyond that. This means that you are running at different schedules, different timings, different group development and etc. Failure to comply as a member means you can ultimately get kicked, yes, that also includes improving as a player on all areas EVEN after clears if the group so wants it.