The basic premise, that it is an anomaly for us to come together into a common social space, is so ridiculous that I have to wonder what her agenda is for making such a blatantly false claim.
People came together from their community to the marketplace to socialize. People came together at church every single Sunday.
Beyond the reaches of the individual community, people of almost every faith used to come together for pilgrimage, allowing them to socialize with other members of their faith from far away places and become more worldly and less ignorant. This was considered a moral duty.
The point isn't to go where people who are your friends are, or to go to places where people who are into the same hobbies. The point is to grow as a human being by leaving your comfort zone.
The real anomaly is in the walls that keep us from knowing each other. It keeps us weak, powerless and under control.