The general objection to milk is fallacious. All 3 macros. Well most meals have all three macros. And the argument that it has a specific design is also fallacious, since no food we can aquire is designed AS food. A cow is not designed for us to cut its leg off for steak. A plamt does not grow seeds for us to eat. Yet when a plant does seem to make a fruit for us to eat, it can be a bad idea to eat the sugar that is there for the purpose. All mammals are born tolerant to milk. If you keep that tolerance then you have access to one of the only complete foods we might have access to. For me, you might need to give me a better reason to reject dairy. YOu might offer the same fallacious argument against eggs. Eggs are not designed for us to eat, they are designed to make a baby bird. Yet they are one of the greatest foods you can eat, Vitamins ADEand K with essential amino acids and fatty acids.