> Frankly, the number of carbs and fiber you need throughout your life is 0

Sincerely, what are you talking about? It's been well-known a diet high in fiber lowers your risk of cardiovascular and metabolic diseases.

Also, no carb diets are largely bullshit. There's plenty of complex carbs with many nutrients. The problem is while "no carb" might be somewhat effective, it's not sustainable for the vast majority of people. That, to me, makes it very close to worthless.