Much of it is Enlightenment propoganda. Trading on Newton’s system, they looked back and represented Galileo as a prophet scorned. Most of them, especially Voltaire, had only a high schoolers understanding of Newton, but pretended to know much more. The Church was in a kind of intellectual doldrums, with no one of the stature of an Aquinas to dig into the new science and reflect on it.
A classic 13th Century sword was imagined as nothing but a heavy machete-like chopper--which is far from the truth. A quality two edged sword from the high middle ages was finely crafted (as any Samurai sword), of high quality steel, and weighed in at just over 2 lbs.
Only now, within the last 10 years or so--are duplicates of such quality swords available.