From first principles milk contains every single nutrient a mammals needs to survive and in bioavailable form. Yes humans are the only mammal which continues to drink milk past weaning but we are also the dominant species on the planet. What precisely is unhealthy about drinking raw milk? And don’t say allergic reactions or lactose intolerance with raw milk contains lactase and lactoferrin which is not heat inhibited by pasteurization and also allergies are not specific to milk people can develop them to any protein including meat