I'm sure that's true, but also there's a lot of very interesting HN-relevant stuff on Wikipedia, and it's perfectly reasonable to share it when you find something pithy.
I've certainly done it and contrariwise have often enjoyed Wikipedia articles (including this one) from other users.
Apropos of which I wish I'd had Wikipedia when I was a kid - I recall being utterly baffled by Brittanica's "explanation" of the term "parsec" and only much later reading a definition that put it in the context of how stellar distances were actually resolved.
Edit: Looking at swibbler's submission history, they're clearly not a karma farmer btw.
There are certain topics that attract a bit of quick attention.