> people get really hungry if they don't eat for long stretches between meals

If you follow garbage diet advice and eat a bran muffin, banana, and skim milk, yeah, you'll be starving two hours after eating. For breakfast I had four eggs scrambled in butter and full fat yogurt with blueberries. I'm just getting hungry now, 12 hours later.

> the hunter-gatherer duo usually do not have to search far for food

Are you kidding? They walk miles and miles.

> !kung san

I don't think the san illustrate your point, but in any case they are a bad model. They are stunted and generally unhealthy, scraping by on marginal desert land. They were forced off the good land. There really aren't any representative modern day hunter gatherers. There are only historical accounts.