Comment by FrankyHollywood

Well people differ. Look around at your colleagues, some have dry eyes and lower back pain from working hours without interruption on a boring task.

Others, like myself, are easily distracted, quickly bored and only work hard with a specific goal in mind. Working on smaller tasks makes it easier to not be distracted. I feel this is more important for people with ADHD.

But you are right, in the end it is useful strategy for everyone :)