You make it sound as if the “left” in the US is as left as it should be and pushing it further is a bad thing. The “left” in the US are full on capitalism appreciators, even under the Obama admin which liberals look upon fondly large mergers and consolidation of power were allowed to happen. This country is lost if we act like one side is doing its job (doing things in the interest of the populace and not corporations).
Refined protein would not be something we would need to seek out if we did not consume so much refined fat and sugar. Also adding protein does not temper the negative effects of the calorie bombs we create, though adding fiber does. Maybe fiber should be the nutrient we add back into our processed foods, but we should also just be eating more things made from whole foods and not refined nutrients.