In your original (upthread) argument that "unbiased news is not a possibility", are you stating that as a fundamental consequence of the news' lossy compression of {all facts} into a smaller product... or something else? It's unclear.
As for averaging out, yes, the vector model was what I was using internally.
Disclosure: I'm US-based, so our politics are traditionally bipolar as a result of our election system (in contrast to Europe et al.).
I would be surprised if vectors don't cancel often though, because think what we're really talking about in a capitalist information space: popular perspectives that are profitably marketable.
What is the easiest way to find an audience? Do what your competitors are not.
So on the whole, high revenue and production cost media (tv, web) in a capitalist information space will converge into bipolar pairs on any given issue, in order to maximize market share.
In lower cost media or operations, it will more likely be a random scattering of vectors.