If their progeny dies, so does their bloodline, hence Darwin Award.
Sarcasm aside, since it flew way over your head, I do feel bad that these kids grow up with such shit parents, but there's not really much any of us can do. There going to keep believing anti-vaccine and other nonsense. We take away their unpasteurized milk they'll come up with some new deathly idiotic fixation.
Also, nobody should be consuming dairy from other animals. We are not baby cows, baby goats, etc. They aren't even that genetically similar to us, it's fucking weird and gross.