There are many reasons why I not so much think that the "Tombs & Tombs only" theory is incorrect as much as utterly convinced of it!
Firstly, the weakest of my reasons:
Giza, Great Pyramid. There is no way that the sarcophagus in the "Kings Chamber" could have been put in place after it was built, so it must have been placed during the build. And there is not so much as a flake of paint or a scrap of bandage remaining - never was even when ma'moun broke in during the 9th century, I think it was. It was empty. And not in one single plundered tomb were the contents removed so tidily.
Where is the Pharaoh's Book of the Dead? How can he hope to know his way around if he has not got his "instructions".
And I could go on like this for hours.
Secondly - the logistics of the thing.
Take, for example, the sheer mind blowing precision it is built with.
Consider how finely positioned it is to the cardinal points. You need a laser theodolite to get that kind of accuracy - and remember too the hill it is built on. The surface is not flat.
There is then the passageway leading down to the subterranean chamber. It runs for 350', and does not go out of true by more than a quarter of an inch in it's entire length.
Think about that for a while.
Then consider the precision the rest of it is built with.
Not because anyone would notice - except, perhaps, a culture that has (re)discovered higher mathematics. You will not spot with the naked eye a deviation of an arc minute. Yet the cardinal alignments are better than an arc second.
Try tunnelling into solid bedrock for 350' without going off true by so much as a quarter inch. Just try it.
But all these are well documented facts.
What they prove to my mind is that the pyramid cannot possibly have been built by slave labour under a megalomaniac, but by skilled craftsmen who for some reason required this accuracy, which is repeated throughout.
And the timescale.
We are talkin 2,500,000 blocks weighing an average of 6 tons each.
Work out if you will over a 20 year period (I think that was the duration of Khufu's reign) just how fast it would have to have been built.
You are talking a phenomenal construction rate of around 1 block every minute fitted into place, repeated for 12 hours a day, 7 days a week for 20 years.
Now, lose the 3 months where the nile is in flood, so the figures get even more unlikely.
125,000 per year for 20 years.
685 every single day for 365 days a year at a rate of 12 hours in a day.
And when you factor in the bigger blocks - the gabled roof of the Queens chamber, the relieving chambers above the kings, the star shafts, the grand gallery - it is, my friend, not really on to try & claim a build rate of a block a minute.
But all this info is right there for anyone who wants to look for it.
And then there is the Causeways to consider too.
And the so-called Valley temple by the Sphinx.
Built with 200 ton walls, perfectly aligned, and there is a wonderful section there where the wall looks just like the building style at sacsayhuaman.
And do you know how difficult it is to pick a 200 ton load?
Ask some construction engineers to have a seriously good look at the site.
Dragging those blocks up a ramp?
Not bloody likely.
The ramp would need to be at a gradient of 1:10 which means a ramp of 4850 feet. built from stone, as mud & clay would simply collapse under the weight.
And harnessing the people to those blocks?
Okay, I'll happily accept how the 6 ton blocks were moved - with the cradles we see all over the place and simply rolled. But we are still talking a block a minute here - assuming a 12 hour day 7 days a week 365 days a year.
Sorry, but the numbers just do not add up.