Ancient Drillers in Peru

👉🏻DRILLERS in Quenqo Grande, Cusco. Why aren't these drilling in living rock investigated? Were they made with Incan tools you see in museums? What kind of machine is used? This stays in the field of mystery. And by mystery we understand what we can't explain. Or don't we want to explain? The official narrative better start exploring better explanations. What do you guys think?