You can't totally protect people of course, but there is also a difference between allowing people to watch only Fox News or only MSNBC, and having a content ag

You can't totally protect people of course, but there is also a difference between allowing people to watch only Fox News or only MSNBC, and having a content aggregator/search engine that silently shifts towards showing you only certain viewpoints, based on your existing views. Especially because such personalization can be done on an issue-level, whereas the biased news sources generally stick to a specific agenda set, which you may not neatly fall into. Not saying it isn't possible to do something like this right but I think it would need to be done very carefully, because IMO it could also make things worse than just having an aggregator that is up front biased in a particular way.