Why is bread considered such a basic food?

In many cultures, bread is seen as food that is at the basic form. But in order to make bread, you need to go through many steps in a precise order and it’s very time consuming (rising, baking, etc…).

Also, bread is made of 3 main ingredients: water, wheat and eggs. Sometimes milk is also added. So why go out of your way to make something that offers less? Like I can eat the eggs, drink the water and milk and eat wheat and it would give me more energy.