I see this descending into an objectivity-of-humour discussion (I remember one of those with SPM about movie-Gimli
).
But surely, even if such foul abuse can properly be called 'humour', would it not be worth it? Suppose they had given the gift of life to men, those same men might use it to try to end the lives of the Wargs. It would be tragic. And we all know how much the Wargs value a good tragedy.
Sometimes, one must give, knowing that the gift could lead to evil, even an ironic evil, as in this case.