Everything has its uses. A light switch controls darkness, and a good book should enlighten you. For ports, they are the gateway to items that fill many of our lives.
Most homes would be incomplete until we add several items that have been shipped from other countries. In Nigeria, such items would range from the wheat that bakers use to make bread, our second-hand Toyota Camrys, the fuel that runs them, to other things that we can’t make ourselves.