Earlier quoted context omitted.
I can't see the parallel between the willful ignorance displayed and the "Dark Ages." Do you think the migrating tribes just refused to believe those aqueducts existed?
The rise of the Church made most of the ancient culture to be believed false of demonic. Philosophers were the first put to the fire. Temples were destroyed, along with the books inside them. With the end of the Roman state, there was nobody left in Europe to maintain the engineering knowledge acquired by the ancient.
History is complicated, but I would say that the Western European dark ages of 500-1000AD were caused neither by moon landing skepticism (or the 6th century equivalent thereof) nor its opposite.