The Old Individualistic West Versus the Collectivist East

The smallest average household sizes in the world are found in europe, north america and east asia. When mam is cooking fo a family of 12, there's some economy of scale to be realized there. But when mam is Cooking for a family of three, she can't be minding a pot of soup all day. In urban china and japan and korea you have wayway more people living in much less space. These are conditions high conducive to centralized food preparation. One eating establishment can effectively feed a lot of people in these conditions.