I am looking at this as an exercise. Believe me I know that hiking is the sport of self reliance. You must be prepared to rescue yourself.
However, this guy was not. I reviewed the facts given and have to assume that this guy was brought out because of the potential for this individual to become hypothermic.
Also, because of his location, it did not present a great risk to go get him.
But it was a great risk to leave him in that weather as unprepared as he was.
Lastly, he was brought out because it was reasonable in this case with all of the facts considered.