There are key insights missing from this conclusion.
1) The person speaking is irrelevant, if hitler gave that talk i would learn equally from him or any source.
2) The category of knowledge that matters here is the merger of nutrition and human biology, insights derived from this merger are what matters not laws of physics.
3) The insight that matters: The body cannot access fat storage when insulin is high. Eating carbs prevents the body from accessing fat storage, as a result if someone lowers calories and continues eating high carb the body will enter into a starvation state NOT fat burning fasting state. This starvation state puts the body in high stress and is NOT the same as fasting, it is also why most people think losing weight is "hard" and gain it back instantly. Its actually extremely easy when done the way the body was designed to do it and easy to maintain when eating what the body was designed to eat.
3.5) Another note prolonged low caloric intake with high carbs causes the body to adapt by lowering metabolism. In our "modern" culture this translates to a thyroid disorder diagnosis by ignorant doctors (i think @Leo Guru is well aware of this one). That person is then put on thyroid medication devastating the body for various reasons, especially because the underlying cause was not addressed only the symptom. The body continues to adapt by lowering the metabolism furter and the doctors adapt by increasing the thyroid medication. A truly incompetent cycle.
4) Functional Chiropractors study health while the traditional doctor study disease and sickness. The education western doctors receive has been fully mutated by capitalism/ pharmaceutical companies. As a result the only thing they understand are treatments that make money. == drugs. Of Course they have no idea there education was fraudulent and go there entire career destroying the lives of there patients. A tragedy.
5) Another important point is carbs are still very important for the body specifically if the person is body building. Where carbs is an important factor for endurance when exercising.
6) The diet the body was designed to eat is something similar to the diet described by "the plant paradox". Not keto. Doe it is a low carb diet.
All of this is coming from someone who has lost 100 pounds and cured severe autoimmune issues, this includes curing crohn's, adrenal fatigue and thyroid problems as well as a list of other issues. Real hard work and suffering was put into these insights.
Summary to loss weight eat low carb/lower carb intake, follow the plant paradox meal plan permanently. Not as a on or off "diet" to loss weight but to be healthy and to maximize the body's genetic potential.