I think that if I still drank alcohol, I also would be an alcoholic. It's why I quit drinking when I did (nearly 30 years ago). There's also the fact that I'm a very laid back and go-with-the-flow drunk, so I can be talked into just about anything. In other words, I have no sense when I'm intoxicated. I'd be embarrassed as hell to admit some of the things I've done when I was drunk.
Alcoholism and drug addiction are all in my family, beginning with my bio dad, who was a terrible alcoholic, and I'm glad I didn't have to grow up in the house with him. My mother was a pill-popper like you wouldn't believe, spent most of the 1960s tranquilized (valium, I imagine), and then later tried to push her 'headache pills" on me every damn time I said I had a headache. Hers were narcotic, would have gotten me FIRED FROM MY DAMN JOB, and after I told her that about 25 times, I finally lost my temper and yelled it at her. After that she stopped asking. I don't know what she was taking at that time, but I know at one time her "headache pills" were methylqualone, in other words, Quaaludes, and I wouldn't touch those things with a ten-foot pole. Three aspirin or a BC powder are more my speed, and they'll do fine, thank you very much. Damn!
Because of all that, though, plus the drug issues my kids have had, I am obnoxious now about drinking, pill popping, and drugs. I don't have a feel for where "reasonable" lies, either for myself or for anyone around me (especially family) and it makes me quite uncomfortable to be around people who are obviously intoxicated. The unpredictability of an intoxicated person's behavior is what makes me nervous, I guess.