It is well known that even Hitler went in those areas to search for things connected with the past.

Take whatever ancient text and they all speak about gods coming from the sky that gave humans knowledge.

It is quite clear that there are many discrepancies between ancient monuments and mainstream history and tech capabilities.

The arc of covenant is described as a terrible weapon.

With all those information on hand it is clear that any military power would like to put some effort to find out if there is any recoverable technical advancement or at least try to avoid other powers to put the hands on it.

I know as a fact that is not childish nonsense by direct (non internet) experiences and I have witnessed how any discovery that is not based on settled science is immediately bought and disappear.

Then I do not think. This is what I know and the only thing I think is that they know something more than me.