You'd think that the most truthful content is going to win the public. But the reality is that the most viral content wins. A lot of software development "best practices" are popular not because they are producing value (their value is often negative), but because they make us feel good.
Very similar to religions, it's not necessarily the most utilitarian religions that are dominating the world. It's the most viral ones.
However, consider that the 99% who don't contribute on Reddit, may be contributing elsewhere.
I never post on Reddit, only browse. But I comment here.
Maybe that's the case with most people. That the majority contribute somewhere, but just not all in the same place.
This would invalidate the hypothesis that the internet is written by insane people. It's just that any one site only includes 1% of the people, evenly distributed across all the sites.