That's the point: The internet IS full of pedants correcting others' statements. (Hopefully those pedants are right enough of the time for this to be helpful training data, heh.)
I think GP (kromem) was pointing out that those corrections are more likely to be phrased as "You're wrong, here's why..." than as "I'm sorry, I was mistaken" because humans are full of sass for other humans and not as full of first-person admitted errors.