Those judgments appear organically through mechanisms as simple as how much coverage a topic gets. The worst case is that a bunch of circa 1900 Europeans write this article https://en.wikipedia.org/wiki/Population_history_of_indigeno... and the impact of colonialism is mentioned in half a footnote rather than taking up the bulk of the article. If systemic bias were completely unchecked, entire articles might not exist.

You might also be interested in reading https://en.wikipedia.org/wiki/Chinese_Wikipedia#Self-censors...