It's one of the major splits. WoW has hand an identity crisis since I would say early wrath. Each expansion flips the script on what is and isnt promoted as a path to power.
After legion the concept of just do harder content if you want better rewards weirdly got relegated to mythic rather then being the go to for all levels of play.
Given that I don't find it outrageous that a generation that never had anything else feels lost without it.