Yeah, but not all grind is created equal. Like killing stuff in fallout 3 say to get money and XP, well blowing limbs off in slow mo never seems to get old. For the D&D there was always getting that better loot also.
But sleeping, going to school, working etc. and clicking those buttons to do so (which has no entertainment value in itself) just because you something once per day, that does get old.
Now it could get better once it's fully done. It was mentioned that the side stuff that could happen (as it's open world) isn't added yet, so burning through a 10 day story line say is dull as nothing happens while you're burning through those days. And that would improve if other side lines (or just random) stuff would happen. But for now it's the worst of grind.
