So you don't think they were tombs? The whole timescale for building the great pyramid at Giza in 20 years is based exactly and ONLY on that idea...that it was a tomb. Which of course there is no evidence of. It sounds like you are ok with the 20 year time scale because of something you read attesting to that being true...seems weird you wouldn't ask questions as to why they think that or accept or deny it as plausible. Your "I don't care why" stance is just an indication to me that you haven't really looked into it. Your "dick measuring" characterization is stupid as well, the fact they built it from the most difficult material possible (heaviest) shows they were proficient at a level they otherwise aren't given credit for.
I am very aware that you are on "team rationality" and you want things to be all occums razor with pretty much all your posting here (I'm on the same team honestly), but if you'd actually try to understand what you are talking about specifically regarding Giza, you'd realize that you're supporting an interpretation of the architecture at Giza that is not only oversimplified in attribution (who built it and when/how) but also you are supporting the mantra of the archeological community, NOT the mantra of the architectural, tool making, geological and stone working community who has a very different opinion of what must have transpired to create what we see today at Giza.
I believe the sphinx, the 3 big pyramids and the mortuary temples in front of them are all likely from vastly different time periods (sphinx and mortuary temples are likely far older for numerous reasons which are not that difficult to describe).