Except that body is unable to sense calories, but it's capable of sensing protein and blood sugar levels. but calories can works as a proxy, "more calories" == "more food" but calories are not all the same.

A calorie derived from a carbohydrate is the exact same as a calorie derived from protein. Are you talking about more caloric densities of different macronutrients? Aka, there's more caloric density in fatty foods vs proteins, for instance?

Kinda like with running. Our hearts have no pedometer. It just works however hard it needs to for however long. The numbers, paces and such are things we add to gain insight into what that performance means. Calorie counting is often also the first introduction many people have to what their macros are like. And there is some wisdom here, around individuals and “calorie quality”, but you can ultimately still use calorie and macro counting as a baseline measurement to start understanding your body. I should caveat, when I say calorie counting I mean, tracking key macros too: protein, carbs, fat, fiber, etc.

Yeah, It's starting point. if it would lead into Macro and micro nutrients that would be great.

FWIW the calorie counting model has worked well for me where others have failed. Anecdata, of course. But counting calories, as well as making some general, loosely-held shifts of what I eat (near zero liquid calories, minimize sugar, more fruits and veggies, max one fist-sized portion of meat per meal) have gotten my weight down significantly, and it feels easier than other methods I've tried.