Either way, Facebook's obfuscation of data is justifiably a cause for the concern due to the mass adoption of its platform. Yet, it's easy to focus on the machinations and fuckery that Facebook engage in to hold our gaze and numb our minds. What's more difficult is to question the agency of its hundreds of millions of users, who each have a slab of skull-encased smartmeat that gifts them with relative free will in their lives. Rather predictably, it comes down to a question of agency and personal responsibility: if you don't like the site, get off it.
But were only it so simple. Facebook is so deeply entrenched in the infrastructure of our personal lives, that it's very difficult for a lot of 'normies'(sic) to just pack up and fuck off. While the HN community may be au fait with the finer points of privacy, mass surveillance, and the founding principles of our nascent virtual civilisation - Dave from softball in Akron or Juliette who has a duck farm in the south of France do not. While they'd be concerned about those things if they were explained and they grokked the implications, their fucks lie elsewhere and, hence, Big Social Media remains a fringe idea.
TLDR: We get the social media we deserve.