Repeat: healthy cows and clean handlers.
What about all those pathogens that come from inside the cow? Can you can tell from looking at the cow if it's carrying coxiella burnetii or brucella species? I don't think so. There are a whole host of pathogens that can be present inside dairy cows that would cause no outwardly signs of infection.
Drink raw milk if you want but don't try and tell us that making sure you get your milk from healthy cows with clean handlers will prevent sickness. It won't. There are no health benefits to be derived from drinking raw milk vs. pasteurized milk. That being the case, why accept the risk?