> By holding off until 21 you can reduce the amount of long term addiction.
Most countries offer a counterexample.
Extreme binge-drinking to the point of harm and even death is quite particular to the US. It's a result of the prohibition on drinking, so the forbidden fruit is abused. In most contries kids drink mildly with family from 13-14 and with friends after that, but it is never seen as a big deal. So there's no pressure to go crazy at 21, or to hide it before that. When something is normal and not a big deal, it's not abused.
Most countries offer a counterexample.
Extreme binge-drinking to the point of harm and even death is quite particular to the US. It's a result of the prohibition on drinking, so the forbidden fruit is abused. In most contries kids drink mildly with family from 13-14 and with friends after that, but it is never seen as a big deal. So there's no pressure to go crazy at 21, or to hide it before that. When something is normal and not a big deal, it's not abused.