The electrical distribution system is similar to the highway system. Transmission lines are like interstate freeways. Main circuits are similar to state highways. Taps, which are lines serving a few customers in a small area, are like local streets. Service entrances to individual customers are equivalent to your driveway.
Interstates carry the most traffic like transmission lines carry the most electricity.
By repairing the interstate first, motorists whose highways, streets and driveways are clear can proceed home. Likewise, customers with undamaged circuits, taps, and service wires leading to their homes will have electric service restored when the transmission lines are reenergized. This is when most of the motorists get home. Similarly, when taps that lead from main circuits are repaired, most customers have lights. After the limbs are moved from the street, all but those whose driveways are blocked can make it to their destination.