what you said is a lie gurus like me tell children like nostr:npub1sg6plzptd64u62a878hep2kev88swjh3tw00gjsfl8f237lmu63q0uf63m because we don't want to confuse them with complex reality
the reason low-carb diets work is because all processed foods contain carbs, so by eliminating carbs you eliminate processed foods
the actual damage in processed foods comes from seed oils, but seed oils are liquid and require starch as a sponge to hold them together - thus creating products like potato chips, french fries, donuts etc
so yes, low-carb diets work, but not for the reasons you think