Do smokers lack intelligence? It depends - as i am trying to point out, this is not as simple as it sounds - child over-fed = cruelty from mother, there are nore subtle forces at work here than require a simple dismissal.
I do believe that soming suggests a similar mind-set, an unwillingness or inabilkity to see that conequences of actions. How else can you explain anyone smoking - an activity which, if completed as designed, will run a strong risk of killing you. It cannot be seen as the action of a logical mind performing fully.
But the two do not equate at all. This level of obesity is unusual, hence its newsworthiness, and i still maintain that this woman is lacking in the ability to see what she is doing, and the long term harm she is doing. To call her 'lazy' is simply to dismiss the compex issues at work here.