It's all just our natural prejudice towards people who aren't "qualified" or experienced. Humans are pretty terrible at judging qualification. Either they'll use some irrational subconscious criteria like the person dressing appropriately or appearing confident, or they'll rely on faulty measurements like scores on some test or having some sort of certification. Sure these are all useful to some extent but we have to start realizing that design has a limit, especially when you enter fields governed by things other than hard science.
Wikipedia works like every reasonable Internet community - read: just fine as long as someone is not trying to make money on it, and as long as those attempts are actively and ruthlessly punished. For some the default picture of Internet is comments under a news article on some big portal. For me, the default picture of the Internet is Hacker News.
That's not true. Go to this page
https://en.wikipedia.org/wiki/Lists_of_celebrities
pick a list and add yourself into it. Within an hour your change will have been reverted.
This claim that anybody can edit wikipedia is bullshit and rather annoying.
I've had old company listings disappear because they had no links. The company is gone! History! Nothing to link to. So that meant some busybody made it their job to delete that piece.
It goes counter to everything on the Internet. You would expect it to read like the comments section of a news article - instead, it's more definitive and factual than news articles themselves. Amazing!