You act as if it's the countries that are doing the trading; it's not. It is the businesses and other entities within the countries that are doing it. They are

You act as if it's the countries that are doing the trading; it's not. It is the businesses and other entities within the countries that are doing it. They are doing it because it benefits them. If a company is doing overseas manufacturing it is because they benefit and it isn't the United States that made that decision.