I’ve never tried this myself because I would miss out on a lot of other nutrients, but I imagine I would be hungry again pretty soon afterwards.

This has not been my experience. People doing keto are often suggested to eat butter as a snack to differentiate between hunger and cravings.

Fats are very easy to overeat though.

Only in the context of carbohydrates. Try eating a stick of butter after you are full. Consider a steak, which is just fat and protein… it starts delicious and wonderful, but quite rapidly it loses its luster and by the end eating the last few pieces can be quite a chore… this is how all food should be, and it can be, in the absence of carbohydrates.

So you could either consider ATP synthesis as anabolism, making this claim a non-sequitur (i.e. how does saying “carbs can be used to move muscle” support the claim of “low carbs will help you lose fat”?), or it’s not anabolism, in which case you’re just plain wrong.

Insulin drives fat storage, eating while insulin is high will encourage significant fat accretion.

But it is a useful way of measuring what we do use for the purposes of weight control. It’s trivial to verify for yourself. Just count the Calories in everything you eat and see that your weight gains and losses are very closely tied to that number.

Agreed, its strictly true. But its not clinically helpful. Controlling hunger via reducing insulin and eating protein and fat to satiety is far more clinically effective.

justifies your stance that no one should have to count Calories.

People can count calories and see success, but its unnecessary if they are not eating carbohydrates - as the body will self regulate appropriately with hunger and satiety signals. You can eat a gram of uranium, and get millions of calories, but its not useful to the body. We are not bomb calorimeters.