Dunning Kruger.

Your body is so much more complicated than a function that takes calories as input and outputs an expected result. You need more than just calories, you need nutrients. A nutrient deficient person does not burn calories the same way a person with a balanced diet does.

Like just think for a second. Is the only variable of food that matters is calories, then why do you need vitamins? Why do we split calories into categories like protein, carbs, veggies, fruits, etc? Why can you get a PhD in nutrition if it’s only as simple as calories in calories out?

The simple answer is it’s not simple. Asserting that it is when it isn’t creates some terrible narratives around exercise, diet, and body image.