The preference for chicken breast in the US is because of the "low fat" focus of the past several decades. Chicken breasts have been promoted as a high protein/low fat cornerstone of a meat-eater's diet.
I also wonder if chicken breast consumption has been promoted by the poultry industry because it's easier to increase the size of breasts through breeding and injecting solution than it is other parts of the bird. That means they can produce more pounds of breast (at a higher price) for sale per bird than thighs, wings, or drumsticks.
I also wonder if chicken breast consumption has been promoted by the poultry industry because it's easier to increase the size of breasts through breeding and injecting solution than it is other parts of the bird. That means they can produce more pounds of breast (at a higher price) for sale per bird than thighs, wings, or drumsticks.