Right, I suppose "shuns experts" was a bit vague. Let me clarify. Wikipedia is the place where an expert's credentials and experience are no match for an unknown conspiracy theorist who has decided an article must include certain content _he_ believes is perfectly valid and useful to mankind.
That joke about the astrophysicist having to contend with the kid from Kansas who owns a book that talks about the laser-wielding sharks at the center of the galaxy, while humorous, has a well-documented basis in reality.
So no, I suppose Wikipedia doesn't shun experts. It just insults their intelligence. Or it makes them go through a number of exciting and mind-numbing procedures that only the regulars know how to emerge victorious from.
Authoritative-sounding proclamations from people like you about what Wikipedia is supposed to be are very different from what it actually is, and you all know that quite well.
The last time I edited a Wikipedia article in 2006 my changes were reverted by one of those zealous article owners (which I'm told by people like you are not supposed to exist), and I was later banned from editing for three days by one of his administrator buddies. Not by him you understand, by his buddy. I was given the choice to "file a content dispute" or something like that. All over a paragraph added to the article about an 80s rock band from Argentina. With a perfectly acceptable backing source, by the way.
Do you think actual experts on important topics would go through that kind of bullshit? They don't. Because not only do you have to be an expert on your field to successfully contribute to Wikipedia. You have to be an expert on Wikibullshit as well. And most people don't have time for that kind of thing. So very few articles ever actually benefit from any sort of real expertise.