When you live in a city generally the pattern changes. You don’t take the car and go do your biweekly costco trip and come back with 20 bags of groceries. You get like 1-4 at a time, and go more often.
A lot of the time just going out anywhere, you can fit a quick grocery stop on your way home so you come back with maybe 5 items. It’s perfectly reasonable to leave work, grab a quick steak at the butcher, some veggies at the store, and you get home with fresh food to cook. Or even go back out because you forgot an item.
City life is just a whole lifestyle. It gets you in shape, and you just don’t think that much about having an elevator to go to the second floor.