I have not heard any Egyptologist ever say that Pyramids are Tombs and Tombs only.
Only that they are primarily tombs
back to the Primary discussion: you are quite correct...on it's own the quarry marking only suggest and association...But the quarry marks are not the only reason Khufu is opined to be the Builder.
Conclusive Circumstantial evidence is accumulative in nature
association on these boards is the broad
misconception that what we do not know is more
significant than what we do know."
Warwick L Nixon, March 8, 2019