Yeah, they say the farm has the healthiest soil and therefore is the best environment for a baby. Lots of healthy microbes for the child’s immune system.
Maybe if you live through it. Back in those days infant mortality was many times higher than when we understood germ theory, washed our hands before eating, used indoor plumbing for human waste contol, washed the cows teats with germicidal solution before milking, etc.
I was breast-fed by my mother (a city girl). Mom very reluctantly acceded to my paternal grandmother's insistence under my father's encouragement that she give me a bottle of some milk brought directly up from the barn.
The upshot was that it nearly killed me. Mom remembered that a long, long time.
I do not think that the thrust of the above article is good for babies, at all.