There are many similarities. Yes tissue cells are in a more controlled environment but there are still issues, and I was referring in part to the idea that any DNA or RNA would somehow be a problem in isolating protein from milk as opposed to tissue cultre cels, which is not he case.
Second, you really are exaggerating when you say god knows what pathogens. The goats are not roaming around on a farm mixing with other animals in the wild, but rather they are in a very controlled environment. You are far more at risk from humans by mixing in large crowd or confined space, say a sporting event, party, subway or airline. Sending your child to school or daycare exposes you to a hell of a lot of dangerous pathogens.
Third, if you are worried about goat proteins contaminating rATIII, then you should also worry to some extent that hamster proteins will contaminate CHO cells derived proteins.
I do understand that the general uninformed public may have issues, but that will be overcome with time. Especially if the DIC indication comes through. Nobody is going to worry about goats milk derived proteins when you are facing a 50% mortality rate unless you take rATIII.
