Excellent point. Some European nations allow kids to start drinking at age 17 or 18, but do not grant drivers' licenses until 20 or 21, and I think that is worth considering here. I would be curious to know those nations' incidence of drunk driving fatalities.
I don't like getting drunk, for three reasons.
First, I've been drunk twice in my life and experienced severe nausea and body aches both times, and this was within an hour or two after having consumed the alcohol. The old expression "sleep it off" was a cruel joke - it was at least an hour before I could fall asleep because I hurt so badly.
Second, I don't like having my senses impaired. My feet felt numb, and with each step my foot felt like it was going through the floor.
Third, it took me decades to control my tendency to talk people's ears off (because I am nervous around people), and when I got drunk that sense of self-control disappeared.