I have been searching for threads about traumatic injuries to wings with bones exposed, and it seems quite a few survive this type of injury.
I'd like to see those threads. Cause there's a world of difference between "exposed bone" and "absolutely shredded", and the medically fascinated part of me is curious as to where those survivors lie.
For example, the split tendons here will never heal without surgery. My sister tore a tendon in her ankle (similar area) and it took her 6 months and a surgery to recover. The tissue on this wing isn't just damaged - it's GONE and it won't grow back.
On the other hand I was reading about a marathon runner that split their chin (they fell and the tissue scraped away) with lots of exposed bone and got treatment that healed in a couple months with wet grafts and no pain killers.
It's how severe the injury is that makes me think there's no recovery without amputation. And if there's no recovery keeping the bird alive is just plain cruel.