Let me see if I got this proposed scenario correct. 4,000 years ago ancient Egyptians possessed technology that rivals today's technology. They used this ancient technology to carve a bunch of rocks. They did not use it to fight, improve their standard of living, or build anything more substantial than rocks. This super advanced technology was simply used for moving and rock carving, nothing more. After the rocks were carved, then then discarded this advanced technology in a way so thorough that not a single trace of it remains to this day. Then, they planted fake tools at the base of the quarries to make it look like they were really using simple tools. But keep in mind those simple tools were just fakes and planted there to throw us off.
The other scenario to consider:
As one would expect, extracting materials from hard stone quarries was significantly more difficult for ancient Egyptians than from their soft stone counterparts. The tools necessary to remove and shape blocks from bedrock had to be as strong or stronger than the rock being cut, and for this reason metal tools could not be used. Instead, workers would chip away at hard stone with tools made from comparatively harder types of stone. Such is the case with the extraction of granite, where dolerite balls were pounded against the rock's surface in order to cut into it.
In order to see how granite was extracted from Aswan by the ancient Egyptians, it is best to look at abandoned quarries such as the famous unfinished obelisk. Though its size was abnormal, it is evident from remains at the site that the unfinished obelisk was cut out of bedrock using the method suspected to have been implemented at other granite quarries. Workers would cut away a trench of about 75 cms all the way around the block intended for removal by pounding at the surrounding bedrock with the dolerite balls mentioned previously. Each worker would have his own quadrant in which he would chip the rock in one corner until told to change position and work another corner. After the trench had reached its desired depth (a bit deeper than the depth of the block being quarried), workers had to cut out enough rock from underneath the block so that it could be broken free by massive wooden levers.
Bottom image (Dolerite pounding ball found in situ at Aswan) From Ancient Egyptian Masonry
Hard Stone QuarriesObelisk making technology in ancient Egypt is an archaeological matter that is quite well understood today. They were generally made from granite coming from well-known quarries located near the banks of the Nile, mainly in the region of Aswan. In a quarry in this area, the northern quarry which is now an open-air museum, there is the famous unfinished obelisk of huge proportions. It is only crudely carved, marks are left which hint to the technology employed in its extraction. Modern Egyptian shows the use of Diorite balls as carving tools for granite, at Aswan
The carving procedureI think we can solve this with Occam's razor. The simplest solution is usually the correct one. I have not seen any physical evidence that would persuade me that space age technology was used to carve pictures into stones, the technology then disappeared, and fake stone tools were put in place as a ruse. To me, that is simply absurd.
The oil barrel is half-full.