So you keep claiming. Here's what the American Society of Addiction Medicine says:
Genetic factors account for about half of the likelihood that an individual will develop addiction. Environmental factors interact with the persons biology and affect the extent to which genetic factors exert their influence. Resiliencies the individual acquires (through parenting or later life experiences) can affect the extent to which genetic predispositions lead to the behavioral and other manifestations of addiction. Culture also plays a role in how addiction becomes actualized in persons with biological vulnerabilities to the development of addiction.
Genetic factors account for about half of the likelihood that an individual will develop addiction.
So you're point is that losing HALF of our population is acceptable? Why do I talk to you people?