So, your point is not the printing press, but it was "the church". Well, in this case, it isn't "the church", so there any analogy already fails.

> history has shown that the ability to spread false information does not prevent the positive impact of true information.

And that's enough? So we can forget about The protocols of Elders of Zion and the stab-in-the-back myth and the misery they imparted because something else overcame that? Or closer to home: we should simply ignore things like Cambridge Analytica and the meddling in the US elections, even though it moved, and still could be moving, the USA towards a fascist regime?

> people are smart

No, most aren't, and even what's normally considered smart people can believe in hoaxes and act to the detriment of society.

> even lies help listeners learn

You lost me there. Learning is not a goal per se. Learning from malicious information can lead to malicious outcomes. If you want to invoke a history lesson, that would be a good one.