How is caloric surplus an "explanation" for anything? Yes, a caloric surplus will lead to weight gain, but why do people choose to have a caloric surplus when c

How is caloric surplus an "explanation" for anything? Yes, a caloric surplus will lead to weight gain, but why do people choose to have a caloric surplus when clearly it's detrimental to health? If given the option, wouldn't you simply choose "no surplus, please"? Perhaps by searching a bit deeper we can begin to understand how the body's mechanisms attempt to regulate calorie consumption, and how we can strengthen those systems rather than subvert them.