Successful low-carb dieter here.
I would have agreed with this at some point but as my experience with nutrition grew and I got older I have a more complete understanding.
If your sole goal is to lose weight then eating nothing but meat works and it solves a lot of nutritional problems we tend to accumulate in modern living. Like fructose and high fructose corn syrup. Highly refined carbohydrates of all sorts. Trans-fats reduced to natural trace amounts. If you are on a meat-only diet you miss out on all that. You also find out that "saturated fats clog your arteries" and "salt raises your blood pressure" and yada yada all sorts of accepted wisdom is flawed at best and outright wrong.
But because people have some success on lo-carb they tend not to recognize the nutritional deficits associated with modern living lo-carb. We don't tend to eat organ meats such as kidneys and liver and brains and so on, and instead focus on muscle meats. If you ate a whole rat like a coyote you would get most of the nutrients that animal had but we don't do that and not even close. We do better with eggs and seafoods in that regard. At the end of the day you aren't eating the way your body evolved to eat.
So those nutrients you don't get from "modern" lo-carb come from other sources, including fruits, nuts, leaves. The key of course is not to exceed your calorie limit because if bodyfat is your concern the war is won or lost being able to sustain a calorie deficit or equilibrium over long term. When you get rid of most highly refined carbs in your diet you find it is much easier than you might have thought to just eat less and exercise more.
... worth what ya paid for it.
