We have always allowed our children to drink wine when we serve it with meals at home which is about 4-6 times a year. Now all young adults, none have shown any proclivity towards a party lifestyle. Two are tea totallers because they just don’t like the taste of any alcohol beverages.
If you expect children to learn to drink responsibly, you teach them, they certainly won’t learn it from their peers.
But I will not go along with supplying a group of her friends with a twelve pack or that sort of thing. That's the sort of thing that leads to these stories, a parent supplying kids with alcohol, supposedly with good intentions of keeping them safe, which ends in some crisis. In this case, death for one of the kids and imprisonment for the parent. No way.
If you expect children to learn to drink responsibly, you teach them, they certainly wont learn it from their peers.
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Let me take your most excellent statement of fact and generalize it ...
If you expect children to learn X, you teach them, they certainly wont learn it from their peers.