A theory is in itself a guess of the unknown, there are also plenty of evidence that also challenge the current narrative.

I know about the textual records and they sure are interesting, however let's stick to facts and those are that we don't know the exact date of the great pryamid of Giza for now we can only estimate.

The great thing about history is that for all we know we might discover another technology next week that might pinpoint even more exact then carbon dating, it explains everything about the pyramids challenging everything we are believed to know.

In the end, it's all about beliefs and I believe the chronology are very much up to debate now and in the future, not choosing to debate history is just sad overall in my opinion nobody wins on that.