The ADA current consensus is that low-carb and very-low carb diets can be beneficial in cardiovascular disease. The difference being that the ADA recommends this as a valid option for nutrition, while the plate method is a piece of public health advice. This public health advice must be applicable to the most people and cause the least risk, and given the expense of replacing starchy staples (major source of carbs) with protein sources like meat and seafood, this cannot be applied to those who are at highest risk of diabetes, those in lower socioeconomic groups.
https://pubmed.ncbi.nlm.nih.gov/31000505/ -ADA Consensus on nutrition therapy
https://pubmed.ncbi.nlm.nih.gov/33767525/ -Cost of different calorie sources
The ADA current consensus is that low-carb and very-low carb diets can be beneficial in cardiovascular disease. The difference being that the ADA recommends this as a valid option for nutrition, while the plate method is a piece of public health advice. This public health advice must be applicable to the most people and cause the least risk, and given the expense of replacing starchy staples (major source of carbs) with protein sources like meat and seafood, this cannot be applied to those who are at highest risk of diabetes, those in lower socioeconomic groups.