I challenge you to highlight the bit that was a joke because there was no joke you just made a stupid comment.

The fact that you can technically drink alcohol at 5 is in no way contributing to kids underage drinking because no 5-year-old is drinking alcohol. Underage drinking happens because idiot adults are buying kids alcohol it’s got nothing to do with the drinking age laws. If they increase the drinking age to 21 like in the United States it would have literally no difference