Oh I'm all about eating meat, just not exclusively. Both of those links advocate grazing livestock, which I 100% support and think it also tastes better. Better than the grain-fed meat that is so cheap and plentiful in the US (I think that's where thras is.) But meat raised that way is more expensive, which makes it difficult to eat only meat and greens (the latter of which are likely to be trucked halfway across the country.) This is how he's "hacking" the food economy: taking advantage of agriculture subsidies that distort the price of meat.

Exclusively eating local produce, grass-fed beef, free-range chickens and their eggs is not only seriously expensive, but in many parts of the US (like where I am) nearly impossible.

Whole grains and legumes, however, are pretty healthful and easy to grow, AFAIK.