Because early school-age children haven't honed their bullshit detectors yet. Seriously though, I'm currently fighting that with my two kids.

They're now old enough that they're becoming netizens of their own and searching for things and learning on their own, but after having to correct a few misconceptions, I've had to sit down with them and explain how they can't trust everything they find in a search and how to perform their own research and validate.

However, getting them to really grasp that while young isn't super easy.