Maybe. In the US I think the more partisan media operations are pandering at least as much as they are influencing (I guess probably quite a bit more). The opinion bubble exists whether they sell ad space on it or not, they have some effect of making it bigger.
There's also the fun problem where the sorting and other display choices of a news aggregator are speech. Why should that speech be suppressed?
Who decides who gets ignored in "vile, pernicious, institutionalized ways"?