Here’s the thing about science: If you had the ability to purge all knowledge of all science, written, in people’s memories, etc. then over time we woul relearn it all pretty much exactly the same. It may take centuries, and what we know today as Pythagoras’ Theorem or Einstein’s theory of relativity would likely have different names for them. But the underlying science behind them will be 100% identical once they are “re”-discovered. Everything we know today about math, physics, electronics, etc. will eventually be relearned.

The same can’t be said for any religion. Wipe out ALL knowledge of all religions and new ones will spring up with completely new stories to try to explain beliefs to groups of people.