Those are pretty healthy lookin’ warriors brandishing those bows, lol. As far as slugs, well...not something I would want to eat but I’m sure they eat more than slugs. And in every culture, everywhere, people have eaten what is available to them. Native people everywhere eat things that we say ‘Ewww!’ to. I don’t fancy haggis but it’s a pretty popular dish in Scotland. I think pork brains are gross but people here eat ‘em with their scrambled eggs. The first man to ever try a lobster or oyster was pretty brave and people probably thought he was crazy. We’re the spoiled ones, with our prepackaged foam trays of meats, far removed from the source.
I don't think that makes us spoiled. It makes us efficient and fairly healthy. Our life expectancy has gone up almost two decades in the past 100 years. We've been becoming much taller over the past 200 years. Most of that can be attributed to nutrition, and probably the rest to medicine.
I agree those warriors appear to be almost fat, something I wouldn't have expected. There's no way to tell from the photos, but I'd expect them to be fairly short, probably under 5'5".
But whatever they're eating, it seems to be enough. They're surviving, or at least the ones we see are.