Yes, it's necessary. Not every activity can be spread out evenly over the course of a week. If I want to go rock climbing this Saturday, I can't replace that da

Yes, it's necessary. Not every activity can be spread out evenly over the course of a week. If I want to go rock climbing this Saturday, I can't replace that day with 40 minutes of rocking climbing every day after work. Also, there's value in every day not being the same as every other day, and in being able to mentally reset at the beginning/end of every week.