For thousands of years, most people just couldn't move very far due to physics and economics. The were mostly forced to be neighbours with family. It's always valuable to have good relationships with neightbours, whether they're family or not. As the old Dutch saying goes "Beter een goede buur dan een verre vriend” ("it’s better to have good neighbour than a distant friend").

(I think that's an adaptation of a section of the Bible Proverbs 27:10: "Do not forsake your friend or a friend of your family, and do not go to your relative’s house when disaster strikes you— better a neighbor nearby than a relative far away.")