Re: Google is the lesser evil
That's not right. Google's API provides just as much access as Facebook's. Google has APIs allowing developers to get access to all your emails on Gmail, for example. You need to log in to the third-party app to grant that permission, the same as Facebook. Facebook's ad targeting is very similar to Google's, and advertisers don't get access to the data with Facebook nor with Google. You can sign up as an advertiser with both, and see exactly what other advertisers see.
Cambridge Analytica was due to the amount of data available via Facebook APIs. The same thing could have happened with Google APIs, too. Facebook's APIs are way more locked down these days.