That's one of the reasons I love it. Every four years I can handle going absolutely insane for a few weeks. In Europe they show the games on big screens in public squares. If your country wins a match people party in the streets. NO ONE works while their country is playing, employers know this and make sure there are t.v.'s in the workplace, otherwise people would just call in sick. On the other hand when your country loses everyone is depressed. In 1990 when Italy was eliminated in the semi-finals by penalty kicks after not conceding a single goal in any of the previous matches it was like the country was in mourning. On the subway into work the next day it was so quiet you could hear a pin drop. Three days after England was eliminated in the last World Cup one of the major British newspapers ran a full page headline that read "Cheer Up" because everyone was still so depressed.
Every other sporting event (including other soccer events) could disappear from the face of the earth and I wouldn't notice, but if the World Cup is not held every four years there will be trouble.