Richard, this is a Permaculture discussion forum. No one here, at least on this thread is advocating any "extremism", and I think the word "absurdity" is actually insulting. As for industrial agriculture producing "a lot of calories", this may be true, but it has been observed by many others that we overfed, yet undernourished. There is more to food than its calorific value; food affects health, and healthy food, in this case milk, is derived from a healthy environment. Unhealthy pasture cannot produce healthy milk, and no amount of industrial processing, which is essentially one of destruction and extraction, can restore it to health. It appears, from the information that is being shared on this thread, that pasturisation merely reduces health risks that can either be eliminated before the point of production, or by better handling and distribution. I routinely pass through countryside that is in a state of collapse; over-cleared, with eroding, degraded soil, destroyed by decades of over-use of fertilizers and excessive grazing. This land is also underpopulated. If given over to Permaculture it could support quite a large human population while producing both "a lot of calories" and lot of healthy nutrition, with the added bonus of a high-value lifestyle. Again Richard, this is a Permaculture discussion forum, where we are free to discuss a better way of doing things. Criticism of industrial agriculture is intrinsic to Permaculture.