That’s not as clear cut as you are trying to represent it here. Allow me to give you an example: imagine for a second that LFR would provide better gear than mythic raiding and the other difficulties. There would still be a small crowd of players who would do mythic raiding, but the absolutely vast majority would do LFR and then not raid anymore above that. Would you say it’s as clear cut as to claim that the vast majority of players appreciate only easy content? Probably not, and the truth of the matter is that every person strikes a personal balance between being efficient and having flavour. Imagine it more as a slider, where you decide how much efficiency at the expense of flavour you want are willing to go, but then the amount by which something is more efficient also skews that balance.