He is so young, it is difficult to argue that his soul may have another plan for him (if he does not heal here).  We don't have the soul's point of view from here. But that doesn't mean you can't try. Lots of positive energy going his way may accomplish healing or may accomplish something else.

Should it be about learning to heal yourself? or having others heal you?

What happens when conventional medicine "works"? What makes someone not well in the fisrt place?

So if he dies, BArdo, I will imagine him flying around on a butterfly wing such as Eben Alexander described.