I think it’s important to remember that he is very young and I remember at around his age learning that life isn’t always fair
Goodness, I think I learned that when I was about six! Wailing 'it's not faaaair' never got you anywhere when I was a child.
He may be young, but people his age can be nurses, teachers, police officers, and a whole range of other jobs and professions that require them to keep cool heads and act in a mature and responsible way.