Why doesn't anyone mention that our diets are also culprits because they weaken our immune systems. Diets full of fats cholesterol and cooked vegetables do not

Why doesn't anyone mention that our diets are also culprits because they weaken our immune systems. Diets full of fats cholesterol and cooked vegetables do not have the required nutrients that we need day to day. This is pretty eye opening: http://www.imdb.com/title/tt1528734/?ref_=nv_sr_1 http://www.imdb.com/title/tt1528734/?ref_=nv_sr_1