No stupid questions

On its face, I originally thought the question "why do organisms age and die?" to be kind of a no brainer.  Stuff breaks down.  But of course I now appreciate that this is a complex evolutionary and biological question and that "stuff breaks" is only one of many facets.  In the same vein, the question "why are kids so troublesome?" sounds similarly kind of dumb.  They are developing; they are not fully self-aware or able to control their compulsions, etc.  But as in aging, this is a complex question with likely several biological and evolutionary facets.