I think people fall into two distinct camps here: the wildly exploratory, who chase everything from lost civilizations to aliens, and the hyper-rationalists, who refuse to budge from safe, conventional explanations. When it comes to Giza, It may be disingenuous to write all the banter off as either conspiracy or bona fide science. While we understand the general progression of pyramid-building in Egypt, the sheer scale and precision of Giza creates blind spots.
There are major gaps in all explanations provided and there are a huge array of interesting but unprovable theories. People fill those gaps with whatever is compelling, but really, none are good enough to prove anything definitively and that includes the academic explanations.
It's entirely possible that we may never have the definitive answer for how they were built or even exactly why, and will have to live with the mystery. But humans rarely will accept that conclusion and we would rather invent certainty than put up with open questions.
We do know pretty much exactly when they pyramids were built though, (+/- a couple hundred years, which in this context is "Exact" enough) as there have been numerous carbon datings of organic material found in the mortar between the stones of the pyramids, which all broadly line up with the other textual evidence (Mehrer texts, etc.) and contextual evidence (Dating of the work camps surrounding the pyramids) and there really isn't any great mystery in how they were built either, just a lack of specificity in terms of what exact method was used (ie. was it an internal or external ramp, were pulleys used, etc.)
There are major gaps in all explanations provided and there are a huge array of interesting but unprovable theories. People fill those gaps with whatever is compelling, but really, none are good enough to prove anything definitively and that includes the academic explanations.
It's entirely possible that we may never have the definitive answer for how they were built or even exactly why, and will have to live with the mystery. But humans rarely will accept that conclusion and we would rather invent certainty than put up with open questions.