People love to buy fast food, and not because it's nutritious. It's not just fast and cheap, but also because it's hot and tasty... but why?It's hot because warmth is easy. It's tasty because it has to be, or they wouldn't make any money. But there's a better reason for it. See, the healthy parts of the animals aren't as plentiful as, say, the tallow.
The lean, healthy parts are limited, and there's always a high demand for them. The fatty stuff comes dime a pound, and we mammals just love the lard. Take anything and soak it in butter or bacon grease, and it automatically tastes better.
Well, that's the business model most of the companies operate under.