First, there's a popular belief amongst their readership (for whatever reason) that this is not the case and that Google actively works against sites like these. Furthermore, if it doesn't currently work against these sites, it's taken for granted that if (for some reason) Zero Hedge became more popular than WSJ Google would work against it.
Secondly, if it were the case that Google would surface Zero Hedge over WSJ purely because of popularity is that ok? Is that what should happen? If Google does want to curate rather than using a "blind" algorithm does that change the way it's regulated and what it's responsible for?
I think this is something we haven't quite figured out as a free society. We recognize that an educated citizenry is a vital requisite for our survival as a free people (please don't over index on who the quote is attributed to).
Yes there are a multitude of media outlets on the internet which the citizenry can use to educate themselves. Are there moral hazards when the majority of the citizenry arrive at one or two doorsteps in-spite of the multitude of alternatives? What is the risk if what's served from that doorstep is detrimental to the republic?