First, since you've been derailing thing from one question another, I have to mention that a thing shared publicly from a Google drive account is no more accessible than a thing shared from a website that a person sets themselves, so Google drive accessibly is not particular answer to social network news filtering.
But on the topic of social network news filtering, anyone who uses a social network is implicitly consenting to that network's filtering of information.
Once upon a time, most people got their news from a single newspaper - well informed people might read several papers as well as newsmagazines but even this implied a lot of filtering. Those newspapers filtered the news more heavily than any present network.