It's not a bad point, but are you sure this actually hurts Google? I believe Google and Facebook business models are advertising-based, so they strive to maximize the root mean square engagement metrics. People aren't just going to leave YouTube and Facebook et al because there's a bunch of fake news and controversy because:

  1. People love that shit.
  2. There's no alternative since these companies are ~monopolies that already own all of the network mass.