They are laws as reliable as the law of gravity. They have been here since the Earth began. They are designed for our bodies and our bodies for them. No other animal eats cooked food. Cooking is a destructive force.
Many foods also turn toxic when exposed to heat.
Fats, for example, when heated become free radicals in the body. By contrast, the more alive your food is, the more aliveness it creates in your body. Life begets life. Animals consume only one food at a time. The human body also is designed to digest one food at a time.