[AlotOfReading]

That's an artifact of immature harvesting. Nixtamalized, mature maize is almost nutrient complete, lacking only protein, a couple amino acids, and fat. All are pretty easy to add in and eating pure corn gruel for every meal would get old pretty quickly anyway. We know that this is a perfectly viable long-term diet because maize spent thousands of years as the overwhelmingly dominant calorie source for many indigenous groups prior to European colonization.