Cell phones, cigarettes, alcohol, eating food, fatigue, children, and dogs are just a few of the many distractions that contribute to bad driving and fatalities every year.  Dumb drivers make bad choices, or get distracted, and this leads to crashes.  DWI is a bad choice and has nothing to do with law abiding citizens responsibly consuming a legal substance.  Unless you want to ban all of the above, your argument has no merit.