I agree with that. The only caveat would be what happens with family. If you’re under age whatever your parents say is ok is ok. I’m not talking about giving whiskey to a 10 year old, I’m talking about a 14 or 15 year old having a glass of wine at a wedding. And the like. It’s nobody’s business but mine.
That is how it is here. Restaurants/taverns can choose not to serve them, but it is all right to do so, as long as they are with a parent.