When it's not translated properly it seems more confusing than it really is:
Arin is basically a male dragon toddler, a 'hatchling' not ready for the outside world. It's often played for laughs (like him being mistaken for a girl and crossdressing to play the part) but the author went out of the way to show that there are MASSIVE consequences involved when beings outside the understanding of humans get dragged into conflicts they lack the emotional maturity to care about. And somehow it gets even worse if there are indeed ways humans can gain enough power to threaten adult or ancient dragons in a straight-on fight.
The most interesting angle (which I highly appreciate) is when you start to understand things from the adults' point of view - their disconnect from things like empathizing even with long-lived elves protects their sanity. Dragons do indulge in 'mortal life' but only when they at least have enough maturity to know it's just a game, cause if they get too attached it will be even more problematic.
I appreciate that the mortals can't wrap their head around how unfair dragons are when they kill people or destroy things on a whim, but I still want to slap them when they get all bent out of shape over it. The best course of action is to let them get back to their dragon lives, or if they are playing house just LET them play house and stop forcing them to fight back.
Edit: So I think I've caught up and I feel compelled to warn anyone planning to do the same, to expect a lot of frustration with Easily Avoidable Problems. I want to praise the author one hand for being willing to have consequences for poor decisions but on the other it's hard to take in stride when the consequences are skewed to favor the assholes.