COVID-19 is affecting people right now. It, and other viruses like the flu, are just a giant rhythm game: if everyone could be isolated for 2 weeks, it would be over in 2 weeks, and we'd never have to deal with it ever again.
We just have a fundamental coordination problem. A lot of foresight and resources are required, and only a Central Overmind that mind-controls everyone would be a practical way to implement that kind of coordination. When the price of non-coordination is extremely jacked up, like in a crazy future where anyone can cook up an antimatter bomb or an extinction-tier supervirus (or super AI?) at home, it's obvious that the only tenable mode of operation is massive surveillance + censorship (and perhaps hivemind motor control) by a Central Overmind. :D