Then the question is; should there be a law for those who risk their lives and join combat units in the military , because under this law they can risk their lives, lose their lives, but can’t smoke or drink, or should an exception be made like concealed carry in my state.
I don’t think people under 21 should be drafted or serve in combat in any case; plenty of soldier/authors have pointed out that young men are best for this because they are naïve enough to do it (killing on command). I have no problem with moving all of the goalposts (voting, military service, etc.) to 21; 18 isn’t what is was fifty years ago.