Because generally when you live on subsistence agriculture you actually do hard physical labor all day instead of whining about genetics on tumblr. As far as healthy = expensive, unhealthy = cheap, there's a grain of truth in it, for example a lb of lean chicken breast is more expensive than a lb of Tyson frozen chicken. BUT! The real answer is that unhealthy = easier, and that "expensive" healthy foods are usually expensive because of a convenience factor. Using the above chicken for example, a pound of boneless chicken breast averages $3.50, whole chicken (gizzards removed obviously) often costs under a dollar a pound. It's less convinent to cut the chicken up yourself, but for a fraction of the price a single chicken turns into several healthy meals. Same story with beans/legumes, pre-cooked cans often hit $1.50 - $2.00, by comparison the same volume of dry beans which you have to cook yourself costs maybe $0.50. Whole Brown rice in the 15lb bag is dirt cheap, maybe 1/3 the cost of that box of partially cooked, pre-spiced stuff. After pointing all this out Hams will often come back that they don't have 'time' to cook right because they're 'busy' but we all know that's bullshit, they're just too fat to stand more than a couple minutes at a time.