>You say they did little exercise

LOL, no, I didn't. You seem to have read my comment like your understanding of that study.

Moderately active hunter/gatherers consuming a massive number of calories a day for their size saw plateauing energy consumption, where increasing the activity saw a reduced climb. Again, humans are not perpetual motion machines, and anyone seriously arguing that doing more activity is magically free suffers from self-delusion.

I referred to "little exercise" relative to gluttonous people with a gross calorie excess who then add a little exercise routine and thinks they'll lose weight. They'd be massively more successful cutting calories.

This really isn't difficult to understand.

I edited a conclusion in, maybe we can agree on it.

Incidentally, because I'm puzzled by the "perpetual motion" aspect too, another lever the body can pull is to reduce or increase energy that goes to the immune system and the brain. (But in searching for the Hadza I found https://news.ycombinator.com/item?id=47042766 "Thinking hard burns almost no calories but destroys your next workout", so it's debatable.)