I agree that some people are more prone to addictive behaviours and I believe that is linked to Family Systems Theory, trauma & genetics among other biopsychosocial factors.
There is a clever Ted Talk worth taking the three minutes to watch that discusses anxiety and what it does to the brain and the shrinking of the hippocampus. It then uses the results of a study on rats and their offspring to further prove the point that anxiety and other mental and behavioural health struggles are passed down multiple generations of rats! “The pups of negligent moms had the opposite outcome, and so became more sensitive to stress throughout life. These are considered epigenetic changes, meaning that they effect which genes are expressed without directly changing the genetic code. And these changes can be reversed if the moms are swapped. But there's a surprising result. The epigenetic changes caused by one single mother rat were passed down to many generations of rats after her” (Madhumita
In the research paper ‘Addiction as accomplishment: The discursive construction of disease’ by Craig Reinaram, he talks about how studies have shown that there are some biological predispositions to addictive behaviours, there is almost no evidence to celebrate or support addiction as a disease. He notes that changes in the brain happen also with adrenaline inducing activities such as gambling, generosity, acts of cooperation, trust, looking at beautiful faces, talk therapy and that we tend to repeat “anything you can do that turns on these dopamine neurons. (Kolata, 2002)” (Reinaram. Craig. Addiction as accomplishment: The discursive construction of disease.doi 10.1080/16066350500077728)
Last but not least, a study by Zingberg ( Drug, Set and Setting. The basis for controlled intoxicant use.1984. Yale University Press) quoted in the above mentioned paper by Reinaram, found that in a controlled study of heroine users, that ‘loss of control’ was not the outcome of regular users like previously assumed, but rather was contingent on ‘social and psychological variables.’ I find this to be exactly what a heroine user on Vancouver’s east side told me in passing when I was volunteering there this summer. He said his relapses and uses were connected to his peers and environment as each time he relapsed it was due to having a bad day and being surrounded by peers who use. If he was having a good day he wouldn’t have the need to use. It was a combination of peer pressure and poor emotional regulation and a desire to feel relief from what his body and mind was feeling.