There are valid reasons to brine a chicken, this is just an extreme way to do so. The salt affects how muscle proteins behave during cooking, partially it prevents them contracting too much, thus in turn preventing the muscles from squeezing out so much liquid that they become dry. lower temperature cooking for a longer time can achieve the same effect and won’t dilute the flavor of the chicken.

Any reasonable step of preparation like brining poultry can be taken too far or done excessively, especially by companies seeking to maximize shareholder value by selling as little product as possible for the highest price. pre-brining chicken isn’t always bad, but it’s not always what you want.