And then other people arrived on Wikipedia and decided that five-page articles on every single character in the Star Wars extended universe (pre-Disney) weren't desirable, and deleted them.
This is a real problem for future historians. Prior ages kept records of what they deemed important, but failed to document the mundane, which makes it hard to reconstruct today how people lived back then. The same problem is posed by wikipedia. Some of the content being filtered out as irrelevant may prove important to understanding the flow of history in 500 years. We can’t know today what will be important and what won’t be.
That’s why archive.org may be a far more useful compendium of human knowledge than wikipedia.