If he meant, "Death is no more!" it would actually be beneficial for a demon.
Without people dying, the spirits do not pass on. The pale imitations linger, and so do not pass into the world of the spirits.
Higbey is a demon locked on the surface world of Graal. The Spirits of the Dead he can command are in the World of the Spirits. If the Spirits did not pass on, he would have armies to command, and would be able to bring forward a great army.
But nay was that his meaning, so s'all good.