A relevant quote from another article: “When non-industrial populations adopt a Western diet, they get sick. When sick people on a Western diet adopt a non-industrial diet, they get healthier.” Common sense applies.
“OK, here’s scenario two. Food companies made tasty new food. People started to get fat. By the 1990s, food companies and, more to the point, the pharmaceutical industry, looked at the escalating obesity crisis, and realised there was a huge amount of money to be made. But, seen purely in terms of profit, the biggest market wasn’t just the clinically obese (those people with a BMI of 30-plus), whose condition creates genuine health concerns, but the billions of ordinary people worldwide who are just a little overweight, and do not consider their weight to be a significant health problem.”