A standard you keep on the days no feeling supports it is the one that becomes who you are.
An offering owed to Yahweh on a day when nothing has happened is what builds a baseline rather than expressing one. Festivals run on emotion already in the room, while morning and evening, every day, without a reason attached, runs on decision alone, and decision repeated teaches a nervous system that a state is available on command instead of on cue.
The ordinary days carry the covenant and the feast days spend what those days funded. A people who keep only the high moments have peaks and no floor, and the gap shows under pressure, in whatever they fall back to when there is no ceremony to borrow a state from.