Perhaps it is because censoring the content is more important to the authors than citing the "dangerous" content.

>Is it possible these things aren't nearly as bad as they claim?

Under the premises of the censors, you shouldn't examine or question their claims. This is for your own safety. Instead, you should implicitly trust the authority figures to dole out trustworthy information.

Approaching the topic with the tools of rational inquiry is a form of wrong-think.