He is. And yet, as the same as Dragon Ball, we're treating it like its for older teens/young adults. Same thing for many other series targeting for pre-teens and even for all-audiences. We go too deeply in thought, which we are suppose to understand that this is for kids, no need to go any further beyond complicated issues and adult situations.
But then again, Kishimoto went on a topic that is very complex, even for a child around 7+years old will have some difficulty to understand. How can a child around that age understand the lessons of bonds?