I think there are several good points in the article.
First, that an addict's drug of choice is determined by his/her unique drug/substance sensitivity. One person is sensitive to opiates, while another to sugar or sex or adrenalin. Knowing one's sensitivity is essential to managing one's addiction.
Second, that neuroscience is opening our eyes to the roots of addiction. Unfortunately, neuroscience is not yet sufficiently advanced to treat addiction.
Not mentioned in the article is the potential of trading a harmful addiction for a healthier addiction - for example, exercise for food or a 12 step program for opiates. Hoffman's death is a warning for all of us that we can easily be sucked back in if exposed to our drug of choice. And it is also possible to overdo a healthier addiction such as exercise.