Using the same logic,
Population says that we have more individuals eligible to play than Cuba, yet they seem more competitive. In fact, the USA has a greater pool to draw from than multiple countries combined that participate in these games.
If the other teams are getting better, then USA talent must be either stagnant or dwindling.
MLB has decided that the better players have to be found outside of the USA. The per centage of foreign born players contines to climb in professional baseball.
We are either inherently less talented or they are inherently better ball players.