*jkI don't get it. how did their technology weaken over the course of centuries/Millennia? The MC theorizes that someone is intentionally weakening the power.... but to do that in the first place you'd have to somehow prove the "weaker option" is stronger so that there will actually be research in said weaker option... and even then it's like, they'll find out right? Right?
Seriously, how the hell do you convince people, "Hey. did you know? Chanting Magic is more efficient than not chanting!"