It is a worthy conversation, but the reason that those two conversational scenarios don't work is because it has become cool to be "hard" and act like a thug now. Teens of all ages, races and socioeconomic status think that acting like a hard ass and being generally disrespectful makes them cool. If GZ approaches the conversation like that he likely get's some smart ass response from the teen (any teen, not just TM), and the likelihood of any teen having the mental capacity to be that respectful in the second scenario is pretty low.