After the recent breaches in Facebook and the data that hackers have stolen, I don't believe that Zuckerberg is capable of protecting our privacy.
And I also think that he indeed doesn't want the full privacy because if that happens then he will probably lose data from the users and he wouldn't be able to "feed" his AI algorithms with userdata.
Well, let's consider this for a minute.
Let's say that we want the secrets of FB. We will keep their secrets secret - their algorithms and business strategies and their calculated lies and misinformation. We tell them, "you can trust us."
We won't get them.
But they want ours.