I think the idea that Facebook is putting democracy in peril is a bit farfetched.
while Cambridge Analytica is clearly a horrible company the idea of gathering data and building some models to better target advertisement to them is something totally normal happening all over the place. And i don't think we can really dismantel the core of online advertising because of one shady company
Evaluating something based on its known external traits without discussing the context in which they're used is an incomplete assessment.