He is basically the John Hammond character in Jurassic Park.
He will continue to cling to his creation well after the power goes out, the kids are missing and the Raptors and T-Rex are loose. Only problem is he hasn't been running this experiment on an island but on 2 billion lab rats. Whether they are Generals, Janitors, Journalists or Teenagers everyone is effected in ways no one fully understands yet.
So now we wait for more and more unintended consequences to mount. Because it's not like a Zuckerberg replacement is going to do any better. This is a problem that has only one solution.
Eventually the park will be shut down and be rebuilt after we understand the psychological and sociological dynamics such networks produces at scale. Right now his answer to Harari is incoherent because no one knows what the answer is. And it's impossible to figure it out while watching the current experiment gone of the rails.
Micheal Crichton however, did provide a possible answer to Harari's question 20 years ago -
"I think cyberspace means the end of our species. It means the end of innovation. This idea that the whole world is wired together is mass death. Every biologist knows that small groups in isolation evolve fastest. You put a thousand birds on an ocean island and they'll evolve very fast. You put ten thousand on a big continent, and their evolution slows down. Now, for our own species, evolution occurs mostly through our behaviour. We innovate new behaviour to adapt. And everybody on earth knows that innovation only occurs in small groups. Put three people on a committee and they may get something done. Ten people, and it gets harder. Thirty people, and nothing happens. Thirty million, it becomes impossible. That's the effect of mass media - it keeps anything from happening. Mass media swamps diversity. It makes every place the same. Bangkok or Tokyo or London: there's a McDonald's on one corner, a Benetton on another, a Gap across the street. Regional differences vanish. All differences vanish. In a mass-media world, there's less of everything except the top ten books, records, movies, ideas. People worry about losing species diversity in the rain forest. But what about intellectual diversity - our most necessary resource? That's disappearing faster than trees. But we haven't figured that out, so now we're planning to put five billion people together in cyberspace. And it'll freeze the entire species. Everything will stop dead in its tracks. Everyone will think the same thing at the same time. Global uniformity"