I will add that even seemingly educated people these days have been largely brainwashed by fads and advertising to forget almost all of the nutritional basics. We were taught in school about the “food pyramid”. It has been modified a bit since that time, but the basic principles remain the same. My wife taught nutrition for several years... oh, the stories she would come home and tell. All of these people who obsess over “carbs”, “protein”, and my personal favorite... the vilified wheat protein “gluten” almost always miss the point. “Carbs”, protein and even fats are all parts of a nutritious diet.
To simplify greatly... in your body everything is broken down to sugar for fuel, fat is used for storage, and protein is used for tissue repair. In order for protein to be used Their are also many essential vitamins and minerals that we need to stay healthy. Vilifying one food group, especially “carbs” is just plain silly... basically vegetables, fruits and grains are all “carbs”. All of these are important sources of nutrients.
We’ve been eating so much in carbs, that what is considered “Low Carb” is really “Normal Carb”, it’s putting things back to where they should be.