Asian countires have invested billions of dollars in the education/training/and infrastructure to support animated films do make them as efficiently as possible. Economies of scale, lower labor costs, etc., etc.

Conversely, American film production for the last ~30 years has been nothing more than a way to circulate a few billion dollars between a handful of studios/executives with no real concern for efficiency. Not saying that Asian animation studios are without controversy (they are), but budgets just have not recently been a concern for American studios like they are for foreign productions.