Not only that it helps the business where you are buying your products. The advantages are big on both part from being nearer to the source and also having a cheaper alternative. Supporting your local brand will help the economy of the country to go big, look at South Korea know they are home for 2 big companies namely Samsung and Hyundai which continues to dominate the market in their own industries.
I think that it was such an order, which dictates the modern business, the only way there can be a modern world. No other way. Mankind has long been on the side of capitalism.