I've been doing a lot of traveling for the past 3 years and I agree with you that it is `definitely not "most"`. Everywhere people interacting with each other in third spaces and cafes even if it is street food. There are open air markets around the world filled everyday with groups of people interacting with each other. There are parks and squares around the world filled with families sitting together on benches. Around the world there are churches, mosques, and temples filled with families and groups of people.
Most places in the world people will happily make small talk or have a discussion with a stranger even if I only know 100 words of their language.
Sure many or most people in some places are working 10 hours a day 6 days a week but I don't think it is the isolation I see in the United States. It is the same in De'Nang Vietnam or a market in Lima, Peru when I went everyday to get coffee in the morning; it was always the same person working ,any time or day of the week, but they were always friendly and welcoming and interacting with with the same people.