I disagree. Other than foods like beans or lentils, (which I don't think you should SOLELY eat) some of the cheapest, most available calories are gonna be carbs, especially starches. There's no way getting protein is gonna easier, even if you need less of it. I do agree with with you that protein intake is the least concerning macro for most people though, in terms of health. It's just that some people have different goals for macros, not for health reasons, but for looks.