Huh? Losing weight requires less resources (money) than maintaining it, you just simply stop eating and fast. Proper nutrition and hormone regulation to maintain your lower body weight is a different question, but even that should be cheaper or the same amount of money given that you're reducing your overall caloric intake, even though the food you purchase may be slightly more expensive.
Also, the root causes are fairly well understood at this point. Yes, genetics play a role (sometimes a large on), but if an individual eats a balanced mostly plant based diet, exercises, and gets enough sleep (minimum 8 hours), then the likelihood of getting T2D reduces significantly. If someone has T2D, they are almost assuredly lacking in one of those three areas.
Parent wrote “Roughly a third of people with T2D have a normal BMI.” Those people can’t “afford” to lose weight not in the dollar sense, but because they have no weight to lose.
Also, the root causes are fairly well understood at this point. Yes, genetics play a role (sometimes a large on), but if an individual eats a balanced mostly plant based diet, exercises, and gets enough sleep (minimum 8 hours), then the likelihood of getting T2D reduces significantly. If someone has T2D, they are almost assuredly lacking in one of those three areas.