There IS no evidence to the contrary.
The Cairo Museum has thousands of dynastic Egyptian tools on display, but you know what's missing? Tools that are hard enough to cut, shape, and polish granite. That would be evidence to the contrary.
They also have hundreds of illustrated panels, showing daily life in their world, and the world of their pharaohs and gods. What's missing from those illustrations? Any depiction of pyramid building or other megalithic construction. That would be evidence to the contrary.
You know what else is missing? Any inscriptions inside the pyramids. But wait. Didn't the ancient Egyptians put their mark on everything they built - most especially the tombs of the kings? Yeah, they did, so where are the inscriptions inside their greatest monuments? That would be great evidence to the contrary.
I am not trying to prove to you that an advanced precursor race built Egypt's megalithic structures. I'm telling you that all objective evidence points to that conclusion, and away from the bankrupt theory which proposes the ancient Egyptians built them.
The tools used to cut stone were themselves made of stone, and they wore out, replaced in turn, over and over, until no more work was being done.
Actually, there is writing inside the Great Pyramid, in one of the relieving chambers, graffiti, "how mighty is the Great White Crown of Khufu" (work gang). Also, there was a small bit of the surviving plaster relief when Egyptologists first recorded the interior, but it has since flaked away -- it referred to such-and-such year of the cattle drive for Khufu's reign. That's two inscriptions inside the pyramid. Never read about those? That's not surprising at all. But you have no more excuse to be ignorant of them.
You're definitely not proving anything, other than your own devotion to baseless superstitions.