New Testament local churches were defined by where their members lived. They are ‘the saints in Ephesus’ or ‘the saints in Philippi’. In our modern society that’s changed: many Christians now travel to worship some distance from home.
This is understandable if desiring a sound church or when family- or work-related circumstances might require it. But in most cases it involves attending large churches in cities or towns, leaving smaller towns and villages with little or no witness at all.