I think you're flattening a lot of complexity here. Yes, I agree that Mark Zuckerberg is probably not terribly interested in our privacy. But one of the biggest outrages in FB privacy history, the Cambridge Analytica Scandal, was driven entirely by a researcher inappropriately accessing and sharing user data. While you might not trust Zuckerberg, and maybe you shouldn't, there is definitely some "there there" when it comes to how researchers handle our data too.