Try living on just water.
I don't think milk is a fad as a result of the American milk industry. Cow's milk and goat's milk has been drank for many centuries all over the world. Animals don't harvest wheat and make bread either, but that doesn't mean we shouldn't eat bread. I like milk and many of the things that are made with milk.
Of course drinking milk is not needed for human survival. People are very flexible in their diets. Before the Irish potato famine, the average Irish family lived mostly on milk and potatoes.
Many Asians and Native-Americans become lactose intolerant after childhood. But most Europeans can drink milk as adults because people in Europe have been drinking milk for many centuries.
I read an interesting account of when Vikings encountered Inuit people (Eskimos), which they called "Scralings", in what is now Canada in about the year 1,000. (Columbus didn't discover America.) The Vikings shared their drink, a mixture of milk and honey, with the Inuit people. The two groups parted as friends. But the Inuits became sick to their stomachs, and they thought the Vikings had poisoned them. The Inuits came back later and attacked the Vikings with bows. By the way, Scandinavian families lived in Greenland until sometime in the 1300s. There was a mini-ice age that caused starvation, and people died or went to Iceland or Scandinavia. So when Columbus sailed in 1492 there were no Scandinavians living in North America or Greenland.
Anyway, back to the original topic. I think a farmer in Pennsylvania might be able to ship milk to a neighboring state easier than to the other side of Pennsylvania in some cases. But it sounded like from the article that the farmer could ship his milk as long as it was within the state.
My question was, why would the state allow the milk to be distributed if the USDA won't? It seems that someone is wrong or someone is not doing the job they should be doing.
I have only drank store-bought milk all my life. My mother said when me and my siblings were little she tried to give us milk from my grandfather's cow, but we wouldn't drink the milk. My grandfather was angry when my mother bought milk at the store.