For whatever reason, a lot of people have this fixation that humans were somehow significantly less intelligent all the way until the modern industrial era. Based on what I've read, human brain hasn't significantly changed in tens of thousands of years. People in the stone age didn't have significantly lower cognitive abilities.
When I think about all this I feel thrilled and comforted. Sometimes, I wish my life didn't revolve solely around abstract tasks and concepts.
Unless you're socially insulated, your life doesn't really revolve solely around abstract tasks and concepts. You spend time with other humans, where you have a lot of non-abstract tasks and concepts. You go buy groceries, which is a physical activity, and so on. Maybe we're blind to it, but our worlds are still very much physical and non-abstract on a daily basis.
This was probably a gift to someone (concept of love / family) or some higher ups (strata / class in society)
And, the reason only a very small sample was found was because someone had the idea, tools and time to probably fashion one out of wood, as it may be more easily workable.