> A couple 15-minute light walks to and from the bus stop and the apartment/office can bring one's energy expenditure up to 3000 calories in a day
Those numbers seems off. A 10km running session (~1 hour) burns approximately 800kcal. You would need quite a lot of "15-minute light walks" to go from 2000kcal/day to 3000. Way more than 4 times a day.
I do agree that the 2000 calories/day, or 2500 if you exercise moderately, is not the whole story. However, I think it is a very decent estimation for most people, as long as you're not a professional athlete or deviate from the norm one way or another.
Those numbers seems off. A 10km running session (~1 hour) burns approximately 800kcal. You would need quite a lot of "15-minute light walks" to go from 2000kcal/day to 3000. Way more than 4 times a day.
I do agree that the 2000 calories/day, or 2500 if you exercise moderately, is not the whole story. However, I think it is a very decent estimation for most people, as long as you're not a professional athlete or deviate from the norm one way or another.