People are many, and weird, and different; the attention of lawmakers & govs are limited, and this can (and have repeatedly made) roadkill of you, with no recourse other than privacy.
In security, to make an assessment of overall risk of a potential vulnerability, we take into account both the probability, and the impact of exploiting such vulnerability. Facebook, and corporations in general, ultimately want to move merch, and, at worst, make you vote for candidates of their choice: probability of being successful is medium, but impact for the individual is relatively low. Goverment laws can roadkill you: probability of this ranges from low to medium, but impact is super high. This advises for being especially vigilant for gov interventions, especially where freedom, and liberties are concerned.
Good luck on getting Facebook to stop using you though [1].
In a similar vain, how does Equifax fit into this mythical world where government is the problem but corporations are not?
But, yes, corporations will quite readily sell all that information to the government, anyway, so it doesn't really matter in the end.
It's not especially governments for which you need to keep the integrity of your privacy - it's everyone. And I would imagine if we're trying to estimate the entities that pry the most, it's corporations. Sure, they may feed it to governments, but there's an energy barrier there (in at least some circumstances) - but the trust of corporations is one of the bigger issues here.