Thus I definitively left Objectivism. Recovered my atheism in the early 1980's, but for awhile I was a libertarian who practiced Yoga. So, the market counts the desire of affluent people for meat as more important than the desire of destitute people for grain. I got my B.A. in Economics and entered graduate school. One messy case that impressed me was milk.
Milk is heavy, so shipping costs are high.
Because of the shipping costs, milk processors are typically local monopolies. Pasteurization is not enough, herds must be kept free of it, contaminated milk discarded. One messy case that persuaded me was water. Usually there is plenty to go around but the quality varies significantly. Property rights to water are impossible to regard as anything but human contrivances.