We have done a lot to reduce risk, which has lowered the need for trust. We have national paper money, credit cards, insurance, flood-prevention infrastructure, FEMA (or did), etc.. We have less need for safety brought by connections with our neighbors.

And, with shipping being cheaper and the internet, you can stay at home and get food delivered, homegoods delivered, entertainment delivered, etc. and live without even interacting with your neighbors or seeing them at the local store.