It's a bias that you can trust but verify. For instance, AV software, and web filtering apps rate websites you visit with a score and could block you from visiting sites with a low score to keep you "safe". If web filtering vendor A is a competitor of vendor B or doesn't like the world view of candidate X, they could easily block you from going there. So we have to trust but verify. This is why open source is helpful so we can see the algorithm or reasons why something is blocked.