Typical example of where in different cultures the same is considered either highly dangerous or part of the heritage and people don't do any damages with it. Give alcohol to a Brit or an Australian - countries in which drinking yourself into a coma is considered "fun" - and minors will welcome the occasion to do something adult. In France, much less so, alcohol is considered part of an overall gastronomic experience, and whilst people might drink too much to be fit to drive there hardly are cases where they massacre each other in a state of alcoholic trance.

Similar things with driving, absolutely OK with 16 years in the USA where people are usually super-prudent, rules are rather strict, and people stick to them (relative to France). The same thing in France and we'd have even more deaths.

Or this one: take away any speed limit on French motorways: disaster. People aren't trained (and typcially don't have the hardware) to drive fast or to behave in a way appropriate in an environment where fast cars are around. Germany: many parts of the motorway network are without speed limit and people drive often very fast, still it's safer than French roads.

Lesson learned: it's not objects that are dangerous, it's people's attitude/behaviour/experience that makes them dangerous. So in a French cultural environment serving wine even with minors around typically doesn't cause a problem.

Question though is: is an airplane, where many different cultures mix including such that don't have the same attitude/behaviour/experience the right place to serve alcohol also to minors? I wonder.