because that is what a lunch looks like in our culture. you can get away with a something simple for a mid morning break if you come home early enough so that y

because that is what a lunch looks like in our culture. you can get away with a something simple for a mid morning break if you come home early enough so that you can have a lunch at home. even at an office job i expect a warm meal for lunch. and i would also say that school for children is more hard work than an office job is for adults so the comparison is not fair.