I think it would be great for Americans to get more exposure to those types of sports, (handball, table tennis, badminton) and get a chance to try them as children. I don't think we need to put pressure on as a country to dominate those events (even if we did, it would take time to catch up with the rest of the world). But it would be good for some athletes to get a chance to compete on an international level and bring more attention to those sports.
Yes, the US should try to build up interest in sports that we don't pay a lot of attention to. Handball, table tennis and badminton are really popular in other parts of the world. The best way to drum up interest in those sports is to inform athletes in other sports about them and the best way to do that is to get them involved at young ages. These sports should be taught to kids in the inner cities to keep them out of trouble and we may find the best handball, table tennis, or badminton player ever.
If Americans want to swim, play basketball and run, while not putting in the time to excel at handball, table tennis or badminton, than that reflects our national character. We don't have to be everything to everyone in the world. This is a democracy, and we have freedom of choice in what we love and where we sacrifice.
The US wins way too many medals. Some of the other countries deserve to win medals.
Also the US places way too much emphasis on sports. The US needs to stop its obsession with sports and start to focus on things that are more important like math, reading, and the arts.