1. The internet means we have many forms of entertainment available without needing to go anywhere.
2. Many of those are social activities, even though we are physically alone. This is completely different from being totally isolated (as implied by the article).
3. The declining economic situation affects the ability of people to pursue leisure activities that would involve actually going somewhere that we might meet up with others.
I believe that within a few years, comfortable AR and VR goggles and glasses will come out, and they will pick up mass adoption. This will lead to a huge increase in social activities, and they will be almost equivalent to truly being in person, especially once eye-tracking becomes popular. Virtual environments and AR teleportation using things like neural radiance fields will be quite realistic.