Point granted, but I believe you should do some more research on addiction. Sure people choose to take that first drink or drug. Who doesn't drink at 19 or their whole life for that matter?. Once you have a drink and if alcoholism is in your genes, you are 4x more likely to inherit the DISEASE of addiction. I know when I started drinking I didn't drink heavily for 2 years then I was already screwed by that point, then alcohol led me to drugs and shit. I am off everything now for 3months and couldn't be happier though. I'm saying it's not like you wake up and say to yourself "hey I think being an alcoholic would be a great life for the rest of my life". Hell no!. It is a progressive DISEASE that you develop and don't even realize. My point is stated so I will allow anyone to share their opinion that they rightfully have.
Are your parents/grandparents alcoholics? My parents are, my old man went to rehab shortly after I was born. And guess what, I drink in moderation. Because I know that I have a propensity for addiction and I take proactive measures to insure that I do not end up in some alley way crapping myself and begging for change. I have never done a hard drug ever. I have plenty of opportunity but again, I decided that I didn't want to spend my life doing horrible favors for another it.
It is everyone's responsibility to know if addiction is a problem in their family, if growing up you noticed that your grandfather smelled funny all the time and liked to smack grandma around you should probably take that into consideration when your an adult.