I always wonder how much of this is by choice ? While what you say is true for many Scandinavian families, there's no law of nature that forces people to isola

I always wonder how much of this is by choice ? While what you say is true for many Scandinavian families, there's no law of nature that forces people to isolate, to not stay in touch with family and friends, or to not be interested in building connection with new people in their lives. So why is it so ?