I think there's great value in European attitudes to alchohol, where it is something regularly offered to children if adults are drinking some with a meal. In many european families, parents or other relatives would expect to help their children train their palettes - distinguishing between grapes and learning the different scents and flavours. This would model wine drinking (and Scots similarly teach teens about whisky) as something to be savoured rather than a dangerous drug to be experimented with safely.
Also - what better place to first experience the physical effects of half a glass of wine - and to develop theories about how to behave under such circumstances - than in the home?
alchohol being "forbidden fruit" contributes to potentially dangerous attitudes to drinking it IMO