The adult world doesn't have to be far more complicated than that.
Could essentially be saying, obey and work. A lot of people won't agree that is the ideal life. If that's not how you interpreted it then you have my point.
Dissent can be patriotic.
Teaching kids to be good slaves to the system...
That's indeed not how I interpreted it.
Being a good person, being a good citizen, and making the world better are all really sides of the same (somehow-three-sided) coin: do what you can for yourself, for your community, for your society. They apply even in the complete absence of hierarchies and higher authorities (and are indeed the very core of anarchism: making societal decisions bottom-up from individuals and the communities thereof, not top-down from some supreme executive authority).