By manually bumping a certain task every day, he feels that it is incomplete. He is faced with the reality and forced to either complete the task, delegate it, or bump it again.
(from How Analog Rituals Can Amp Your Productivity discussing why Bob Greenberg, the CEO of the digital agency R/GA writes his tasks every morning despite having access to technical solutions, or probably even a PA to perform this task for him)
Yes, monotony and routine can be truly wearisome. They transform our colorful, over-stimulated existence into black and white. But a task left undone SHOULD be a burden. If you make your system for productivity too productive, you will become anesthetized to your responsibilities.