In most of Europe people can legally buy alcohol at 18. Even in the relatively puritanical UK a 16 year can be served alcohol with a meal in a restaurant. The age limit for drinking alcohol in private settings is MUCH lower.

On you main point, physical strength is clearly still important for some roles. Women are also more vulnerable in some wars where rape is used as a weapon or war (although men are not immune). On the other hand, in general, I agree with you that women should be trained and conscripted if men are. Not being as good at all roles, does not mean they cannot be as good at some.

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