How proficient a country is at a given sport is derived from the size of the feeder pool. Baring extremely rare exceptions, top talent is strongly correlated with deep feeder pools.

Sports are always cultural: Kids grow up idolizing the stars of their childhood, and those stars are drawn from the sports their parents and community expose them to. In Europe, soccer is the biggest sport, everyone grows up watching soccer on weekends and so the feeder pool (i.e. the pool of kids who are drawn to the game) is much greater than other sports. Deep feeder pool allows the system to filter relentlessly to tease out the best.

In the US, and North America in general, kids grow up watching football, basketball, baseball and hockey. So that's what kids end up playing, and all of those sports have deep feeder pools. Soccer not so much.