What does it mean that people who buy cakes are always more valuable than people who draw cakes?

The person who sells cakes is always more valuable than the person who draws them, because the person who sells cakes receives your money, but it is equivalent. You are full after eating a cake, and the person who draws cakes may draw you a grand blueprint, but they are all empty and useless, which may lead you to the road of getting something for nothing. Obviously, you can grow up through hard work, and you don't want to make cakes when you are disturbed, so think about it.