pleased to eat

eating to compensate

This is unsurprising. There are plenty of correlations with people who eat/drink/dope/smoke because of depression or anxiety disorders. Both would very likely interact with something like dopamine receptors and the amount of pleasure people derive from an activity as basic as tasty food. The 'impulsive' nature of such people, as indicated as an alternative interpretation, is very likely a compensation for the lack of easily defined pleasures in life (because of the lack of dopamine activity in someone with clinical depression for example). Exercise can solve many of these problems by kicking up the active levels of the body. But if the type of person who needs the exercise the most can't get up any attraction to it, then obviously they're not going to stick with exercise to resolve this by natural means.

I'm not sure this is an appeal to impulsive behavior in other words. But rather, it suggests that there are specific traces that can be observed (genetically) for people with various 'problems'. If that's the case, it shouldn't be too much of a stretch to design some form of medical prescriptions which attack the root of the problem in a bio-chemical sense and allow people to then institute their desired habits instead (assuming of course that people still recognize that being an obese drunken crack addict smoking on a street corner is a bad idea).