The thing is fake moon landing people are also flat earthers and shit. To them, the money isn’t the important part, it’s the hiding of some sort of special knowledge. When you say it would cost more that implies that there’s an option that costs less which is possible in the first place.

To them, there’s always another layer of justification they can add. Russia would have said something? Well, you see, the Russia/USA beef is manufactured by a secret cabal of, I dunno, Freemasons. It would have been leaked? Don’t worry, everyone involved was replaced by obidient clones.

With a good editor, some conspiracy theorists could be decent writers if they weren’t using their creativity to be insane.