You seem to be contradicting yourself, confusing "things which happen to be exercise" with "things which are intentionally exercise."
Your argument was originally that the ancients performed the latter, but you've supported yourself with examples of the former. Hunter-gatherer tribes certainly did and do activities which happen to be exercise all the time, and that (and other reasons) are why they didn't need to set aside time and energy for the express purpose of staying in shape.
I'm really not. What I'm disagreeing with is the idea that exercise is defined as physical activity without productive value. It certainly could be that but only because that's what we now frame it as, which itself is a purely contemporary idea. No wonder "exersice" today seems so pointless. Much of the modern world is without the ritual it once possessed. And then we defend our new ways as more pure. For me, it's a head scratcher.
Your argument was originally that the ancients performed the latter, but you've supported yourself with examples of the former. Hunter-gatherer tribes certainly did and do activities which happen to be exercise all the time, and that (and other reasons) are why they didn't need to set aside time and energy for the express purpose of staying in shape.