Often when editing a page, I am left wondering where exactly the previous editor has gotten a fact from. The Wiki markup even allows "quotes", i.e. short extracts of what exactly you're referring to, but I've yet to see anyone beside myself actually use it consistently.
Having a structured list of references for a given topic in a Wikipedia article is incredibly helpful!
Just one very recent example: https://www.engadget.com/chinese-wikipedia-editor-fake-russi...
This recent example is awful, yes, but relied heavily on a Wikipedia project which has less strict referencing rules, and was consumed by people who didn't take the time to fact-check — we're about on par with Encyclopedia Britannica (ref: https://www.nature.com/articles/438900a)