To reduce the weight of the pot, the next sentence is that people can eat less.

Because a thin pot means that there are few things in the pot when cooking, then the next sentence should be that you eat less because the rice is cooked less. The implied meaning of the expression is the process of people losing weight and dieting.

However, when people lose weight, it is best not to choose dieting to lose weight, so that resuming eating will rebound immediately. The healthiest way is to exercise to lose weight. It won't be so difficult if you don't rebound.