Wikipedia set out to be an encyclopaedia, not a collection of random facts. Complaining that wikipedia isn't a collection of random facts is like complaining that vi isn't Nethack. There's no reason why it couldn't be, but it isn't, and the people maintaining it don't want it to be, so that's that.

I've never understood why those who do want wikipedia to be wiki-random-non-notable-factia don't just start wiki-random-non-notable-factia. I predict it will be fairly unmaintainable, but I'm totally keen to be proven wrong.