I understand why people may regard such an event as tragic--and do concede that in this particular circumstance the kid's age poses a question of the legitimacy of the act. Perhaps his brain wasn't fully developed. Perhaps he hadn't enough time to discern whether it was an 'ideal' time . . . or had he more time, perhaps he would have chosen to remain alive altogether, until he experienced a 'natural' death . . . perhaps perhaps perhaps . . .
This series is endless and ultimately only speculative . . . No one but him will ever know.
In this community there are individuals such as myself that believe in the value of the right to choose, and in that (at least illusory insofar as I'm not convinced that we even have a choice to begin with) self-agency, discover an uncanny beauty. We may not be able to choose our circumstance of entering this domain, but we may be able to leave on our terms (or at least experience the illusion of such).
He made his choice and there is nothing to be done.
I'm merely acknowledging the silver lining.