So, micronutrients are a thing, and your body creates devastating cravings if you're missing them.  You are not a combustion engine and need more than raw calories to be healthy. Throw in the carb + insulin cycle and they're even hungrier, constantly. That said, eggs and frozen veggies are cheap, and eggs are damn near a miracle food when it comes to said micronutrients. So still no excuse, but it's not so simple.