You shouldn't use anything as the sole source for anything, in my view.
People do fun and interesting things because they're fun and interesting.
I think it's a mistake to treat different realms of knowledge as if they are some how fundamentally the same.
The core of Wikipedia is something people really believe in. That is too valuable for the world to screw it up.
It's kind of surprising that you could just open up a site and let people work.
When I opened Wikipedia, it had three articles, yet it was called an encyclopedia.