Not proof, just unfounded speculation.
First you find a quarry with rocks that have nice clean cleavage planes. Then you cut slots in the rock at intervals along a cleavage plane (
picture). Then put wooden wedges in the slots, and pour water onto the wedges. The wood will swell and split the rock along the natural cleavage plane.
There is a description of the process at
The Unfinished Obelisk.
We have the archaeology to tell us how the stones were quarried. You are the one closer to the ancient astronaut theory.
We have the evidence; you don't.