As an example, the amount of life-sustaining food we can get from a cow using modern techniques is so much more than by using old techniques. Yeah, sure, some o

As an example, the amount of life-sustaining food we can get from a cow using modern techniques is so much more than by using old techniques. Yeah, sure, some of it doesn't look very pretty; cry me a river. For a very, very long time throughout human history dying because there wasn't enough food to eat was something everyone had in the back of their mind (and still do in many places). Much processed food and big bags of frozen vegetables and so on is healthy and cheap; it's got what you need to stay alive in good condition and doesn't have (for example) arsenic in it, which to my mind is pretty much the definition of healthy food. Fat, protein, whatever; once it's broken down to cross the stomach, it all looks the same. It's only a problem if people simply eat too much (or not enough) of something.