So funny to see people reflexively defend those things being left off because it confirms their own beliefs. A deeper inspection of the actual guidelines has them being very fair to plant proteins:
> Consume a variety of protein foods from animal sources, including eggs, poultry, seafood, and red meat, as well as a variety of plant-sourced protein foods, including beans, peas, lentils, legumes, nuts, seeds, and soy.
The thing is... the pyramid is just a graphic, the actual words give more context.
There are plenty of lactose intolerant people. These people can meet their nutritional needs without dairy. (For Calcium: via Sardines, leafy greens, Tofu, etc.)