Say what you will about modern life but I am in no hurry to go back to hunting wild animals and foraging. There are factors to consider besides how healthy the average person is (surely a skewed measure given the unlikelihood of your surviving if you are sickly or weak).

That piece also seems to be somewhat unspecific on what exactly "limiting the population" entails; after all, infanticide, a lack of medical care of any kind, and outright murder are no less available to a farming society, if you really are arguing for such a solution to inequality.