Because you're actually arguing for no ownership. You think you're not, but you're basically saying that communities "own" things, which is crap. Your Native American example is just as bunk as anything else. Not only were the tribes diverse in their customs, the vast majority believed in personal property. Some to the point that people of higher importance got better things. One example, Google "Horse Culture" among Native Americans. The same existed for almost everything and they definitely bartered along themselves with personal possessions. It's been a big topic of research and discussion for economists recently since libertarians use examples of Native American systems all the time. Maybe you're referencing how they didn't own land, but that again is a half truth. Pretty sure there are some famous stories about how the land was bought. Just generalizing the tribes like you did shows the ignorance on display.