For starters, I have no fear of death itself after so many brushes with it in my life, only the pain of living. And my life itself is pretty hollow. So the ecosystem dying out that way is pretty redundant to me.
And no, I wouldn't want those wolves culled or ANY animals for that matter. I value animal lives more than humans. I've seen the full depths of human cruelty towards animals already through meat packaging documentaries and glimpses of the animal torture market down the rabbit hole. Humans are not worth more than animals. I think the people that at least place human lives over animals in terms of value have not undergone the trials of witnessing real human depravity. It flips your world upside down to know what you might see in the worst movies don't compare to reality itself.