At the recommendation of an acquaintance, I re-watched "The Magic Pill" (once it started, I recognized that I had seen it before) on Amazon. It recommends a high-fat, low-carb diet and shows examples of dramatic results in case studies using volunteers.
I'm still unsold on the theory that one can eat "whatever I want" as long as it isn't carbs and sugars. One of the filmmaker's theories is that other carnivores in nature are able to self-regulate body weight while still feasting until satiation, yet he fails to consider that they also necessarily fast for extended periods and have irregular eating patterns due to the variable availability of prey and their physical ability to continue hunting beyond the point of satiation. And I imagine an obese predator in the wild either "self regulates" back to normal weight by being unable to successfully hunt, or becomes a feast itself for something else in the food chain. And those that can't maintain a healthy body weight on the other end of the spectrum are also cruelly absent from the sample pool. When allowed to work, natural selection is a motherfucker.
Turns out that a critical review of the subjects in the video who experienced the diet had been on high-sugar, high-carb and low fat diets to begin with. And the research did not encompass longer term health effects of eating a high-fat diet involving things like lard-smeared broccoli, pancakes made with squash and ghee, or daily helpings of bacon and eggs.
My takeaway, seemingly elusive to the filmmaker's eyes, is the elimination of added sugars, processed foods, and complex carbs is what resulted in weight loss, perceived health, and improved cognitive function - not the substitution of high-fat elements. Fat and protein are both critical to our bodies, but they don't need to come in daily overdose portions nor be the overwhelming basis of our diet.