So, because computer science does things differently from other fields, it is at fault?
There is a (hotly debated, etc, etc) wikipedia policy that article topics have to be 'notable'. If a topic is only covered in academic literature, one can make a perfectly sensible argument that it's obscure and not 'notable' enough for a general encyclopedia.
You don't have to agree with the policy (I, personally, am totally indifferent to the whole topic) but you write as if the very idea that something that's only mentioned in conference proceedings is obscure (CS or not, doesn't seem all that relevant either) is somehow irrational and worthy of great indignation.
As for the broader issue of whether academic entries are notable, surely the massive body of mathematics entries on wikipedia indicates that material which is never mentioned in the newspaper is notable.
The importance of conference proceedings in distributing CS research doesn't seem particularly relevant.