But you don't need to convince every voter, just give a nudge to the right direction. Also, a ton of people are falling for really easy questions, like "is human caused climate change true", there really isn't much propaganda should matter in those cases if people had the tools to find even the simplest, most clear facts.

But I'm not even sure if it was possible - lots of people seem hellbent on believing what they want, I've thought that probably comes from evolution from time when we didn't really have ways to study reality that well, and group cohesion was more important than individual thinking. But we should have at least tried. It was quite clear people would get corrupted when they're sent out of school with a bag of knowledge but no real ways (or will) to really judge any future information