It actually costs a lot to do those things. Money is not the only important cost. Social cost and time cost are also important. If you eat all your meals at

It actually costs a lot to do those things. Money is not the only important cost. Social cost and time cost are also important. If you eat all your meals at home alone, while your friends go out to restaurants, that's a cost. If you spend time cooking from scratch instead of using processed food, that's a cost.