I think the issues with lactose intolerance are due to two things. First, digestive enzymes occur naturally in raw, healthy milk that play a significant role in allowing the human body to digest it. My wife is lactose intolerant but can drink raw milk without issue.

Another issue are allergies. I've heard anecdotal stories that point the finger at childhood allergies being caused by vaccinations. In other words, kids with few or no vaccinations generally have few to no allergies compared to fully vaccinated kids.