You are quite right, which is why I said, "Epidemiologic studies tend to support the notion that in a practical setting (not an ideal laboratory)"... These are

You are quite right, which is why I said, "Epidemiologic studies tend to support the notion that in a practical setting (not an ideal laboratory)"... These are studies of what people do in the real world, not whether thermodynamics applies to people (which, of course, it does).