GP isn't suggesting otherwise. They're saying that people trend towards larger networks, regardless of the quality of those networks or their impacts. Facebook and Co can be banned tomorrow, but the next phase will see a surge of small players getting bigger and bigger until one of them reaches a Facebook and Co. For India status, landing the people of India where they started. Except that the new incumbent will be more easily pressured or controlled by India's government.

But that doesn't prevent said conversations from happening on a large social network.

Email, Facebook, SMS, Twitter, and Discord are all massive networks that all can also facilitate small group conversations.