Considering the immense forces that have blown apart some massive megalithic structures, that seems unlikely to result from starving hordes of angry people. Vitrified stone, commonly visible on sites as distant from one another as Peru and Europe, isn't really potential to such folks. The kinds of weapons and international conflicts detailed in the Mahabharata do seem to fit the bill - and also to very much describe jet fighters and missiles, potentially even nuclear, such as we possess today at state level.
None of that reflects on the tool that could have bored tapering cylindrical holes while leaving spiral toolmarks on both core and walls of the hole. It is an interesting engineering problem to consider how a toolhead could taper a cylinder without interfering with the walls or core, and then to consider the depth of cut was ~500 times what our modern tools are capable of, and the very thin material that cutting tool was made of.
Thanks!