> The real concern I have is how the large majority of westerners are overweight or obese

This doesn't tell the whole story either. In Europe, for example, plenty of women are within the "healthy" BMI range, for example, but their muscle- and fat-distribution is such that various clothes made for normal weight do not fit.

For example, for some women, finding pants which are both large enough at the hips, and thin enough at the waist, is a nightmare. You can be well into the bottom range of healthy weight, like closer to underweight, and still have clothes for normal weights be WAY too tight, because of fat and muscle distribution and build.