Because Facebook invested billions of dollars in making the most amount of people use Facebook, even people who previously didn't use computers at all. Not ever

Because Facebook invested billions of dollars in making the most amount of people use Facebook, even people who previously didn't use computers at all. Not everyone is digitally literate. In practice people buy from different countries for monetary reasons. Why buy all your food from you own country? (spoiler: bc u alredy liv in it and tis hard 2 liv in many countries @ once bc it takes work)