White rice is linked with 10% increased chance of t2 with each serving per day(1).

I don't know if poor Americans are doomed to diabetes, but it is certainly orders of magnitude easier for the poor to eat poorly compared to the rich. Boosting morale in the poor is difficult without cheap fatty/sweet food and drugs, other poor people have nearly nothing else to get by excessive stressors except exercise. Running a perfectly clean life is admirable and very difficult with limited resources, social standing and spare time.

(1)https://www.webmd.com/diabetes/news/20120315/white-rice-link...