BECAUSE HE WOULD FORGET HIS KINDNESS AND HARM HIM.
Because if he didn't rescue the man he would haved died.
He was a kind and caring man.
I think he rescued the man anyway because he could not think of anybody dying like that because it is a horrible way to die. The hunter could not stand to see anything suffer, and his morals and values were to high to let a living creature starve in a pit.