This Is More Common Than People Know
The Olympics try to encourage every nation to develop their athletic talent. In some sports every nation can enter at least 1 man and 1 woman in 1 event only. That makes for some interesting outcomes.
In track & field and swimming there are competitors from third world nations that would easily lose to high school athletes from Europe, North America, and Australia. These high school athletes have no shot at the Olympics.
Eddie the Eagle is one of these athletes and he comes from a strong sporting nation vs. a nation with weaker sporting history.