That sort of stuff is for when you are literally starving in the middle of nowhere.
Not a daily diet.
Once more, beef, mutton, even pork and chicken are, for the most part, plant based. (pigs and chickens will eat meat, too).
These creatures convert biomass not fit for human consumption into biomass that is.
There are tremendous numbers of by-products from the inedible parts, as well. Nothing gets wasted (one of the beauties of capitalism is finding ways to turn by-products into cash flow).
Besides, according to the NYT, "Now researchers report that termites, digesting vegetable matter on a global basis, produce more than twice as much carbon dioxide as all the world's smokestacks."
They also poot out about half a microgram of methane a day each, and while that might be a cute little fart, there are billions of them. They add up. Seems like such 'greenhouse gas solutions' might be worse than letting the occasional cow rip one off.
Enough of this silliness! Quit spending money on it, already. Go get a cheeseburger!