Blizzard says they think everyone will have one some day, which is in direct contrast to your statement here.
It’s also the principal - removal for the sake of removal. There have been countless suggestions to remedy whatever their issue is without taking anything away (save the AH vendor on the mount, which would leave the ones with it “prestigious” or whatever) that have been ignored.
The biggest and most realistic argument against the removal is if you take away long term goals, you lose long term subs. Give me something to work for at my own pace and I’ll keep giving you my money. They apparently prefer short content release burst subs.