Because unfortunately its working, despite yours and others complaints the game has continued to grow, gain more players it's not faltering or stalling out its still going in its stride and until something goes wrong SE are going to see no need to change anything.
People have been saying ARR needs fat trimmed as it turns away new players, I agree but the game pulls in more than it notices leave because of ARR.
PVP people want more, but the game continues to grow so it doesn't notice the people who want more PVP, can't get it and leave.
People want more end-game, more hardcore content more long lasting content but the game continues to grow without it so onward it goes.
That's why someone way at the start of this thread said the best thing all you people who want more end-game more hardcore content could do is leave permanently, not to get rid of you but because the only weapon SE will listen to is the bottom line, Yoshi listens but he can only work with the resources hes got so a shift to more of what you want is unlikely as is even if you did all leave as so long as the game continues to grow and thrive under its current model SE won't miss you.
You keep asking why the casuals aren't willing to give up a little of what they have for you but why should they? There are better options for what you want elsewhere just as this game suites their needs, you keep trying to tell them this game would be so much better and would tap its "true potential" if they just give you what you want, but what dose that mean to them? How is taking something even small away from themselves for content they have no interest in better the game for them? It dose not.
You're asking them to take something they like and alter part of it into something they do not, it's not surprising you'd get push back more so when you're telling them the 90% of the game they enjoy is irreverent to you while your 10% should be increased at the cost of theirs when there are games that already cater better to you and worse to them, but they are not there asking for it to suite them but you are here telling them to suite you.