As someone who has tracked their calories every single day for over two years. Every meal. Every piece of food that enters my mouth. How does my body not run on

As someone who has tracked their calories every single day for over two years. Every meal. Every piece of food that enters my mouth. How does my body not run on calories? I meticulously calculated, tracked, and adjusted my macros to a point where I have a hard number at which I know what % of fat I'll lose, over a specific period of time.