You under estimate the genius of the past.

On the opposite, I overestimate them here, closing my eyes on many inconsistencies and utter indifference of our ancestors to many interesting things around. If I began to dig into real, practical results of that ancient knowledge praised here, the picture will be much, much worse.

Very simple question - humanity know lenses and concave mirrors from a very ancient times. How comes, nobody of that ancient geniuses never tried to compbine few lenses and or concave mirrors to create a telescope, until Galileo times? If ancients was so interested in cosmology, who prevent them to try to use lenses/concave mirrors to look deeper into sky? Isn't that obvious to try to use well-known effect of lenses or concave mirrors to magnify objects in the sky if ancients was so interested in them. But somehow it took few millenias to finally do that.

So, don't even try to think that I underestimate ancients. I have a tons of questions like above about why they was so indifferent for studing the universe around, when many things to do was absolutely technically possible even at a very ancient times.

Just think, how our world could look like, if telescope was invented not by Galileo, but by Archimedes, f.e. And if you immidiately didn't come up with the question who prevented that, and how many similary simple things is not invented yet for that reason, you are not anywhere near anybody who could be called "conspiracy theorist".