The case for coherence in laws governing teens is the same as it is for legal coherence generally: Forcing citizens to live under a complex patchwork of rules and regulations not unified by a logical or intuitive principle makes compliance more difficult and undermines respect for the law. 

With the rise of interest in restrictions on social media, for example, there may soon be states where teens could legally own a gun, get an abortion, or have a full-time job, yet not be permitted to do a little dance on TikTok or send a spicy text.