Some kids should probably have been allowed to vote since they were 12. Some adults probably shouldn't be trusted with glue. Yet for some reason its taboo to say, some kids really do know what they're doing when they signed up for the army and should be allowed to do it, and some adults really have no damn clue what they're doing when they vote and should maybe not be allowed to.

Age cutoffs are an arbitrary and shitty substitute for a test of competency, prone to both high false negative and high false positive rates.