Senators usually live and work in the states they represent.
Some even have mobile offices built into RVs so they can travel the state and deal directly with their constituents. They know their state and its people and its culture. It's the only way they can decide what's best for the people they represent when they vote in the senate. Very few states are represented by someone who just recently wandered in offering their services. The next New York senator should be a New Yorker.