Yes the game is made for raiders it always has been.
You want to see where the ony quest line goes? You have to raid.
You want to see illidan at all? You have to raid.
You want to learn about the Titans or see how arthas ends? You have to raid.
The only difference is that back before mop there was only really raid content and dungeons for end game (daily’s to I guess) where post mop not counting Wod we have had little extra things none raiders can take part in even if a lot of that stuff isn’t the best.