You're not wrong, but there is societal momentum to eating too much too. Common portions in the USA are ridiculous compared to say Japan. The size of a cookie,

You're not wrong, but there is societal momentum to eating too much too. Common portions in the USA are ridiculous compared to say Japan. The size of a cookie, a pastry, a donut, a bag of chips, a candy bar, a meal, etc... It's much easier to avoid eating too much if at every opportunity too much food is not being put in front of you.