When Benjamin Franklin was asked about how to stop poverty, he said (paraphrased) "The best thing we can do for the poor is to make them uncomfortable in their poverty."  He said this because many needed to become uncomfortable in order to motivate them to stop being lazy and using others.  If they were really uncomfortable, they would do what was necessary to improve their situation.

In the same way, we don't want to make people comfortable in their obesity.  It is hard work to turn things around when you're addicted to carbs and toxic chemicals, flavors, and colors.  It is hard to change when you feel bad and therefore don't have motivation.  We shouldn't be mean, but we don't wan the obese to be comfortable because that is not for their personal good.