I dont know about at what distance is an ethical decision to wait on to take a shot. My dog is 45lbs. She can move 20 yards faster than I can move 2 feet. She can beat me inside from across the back yard before I can turn, and get into a door. The few wolves here in Idaho I have seen in person in the wild were boardering 150lbs. Their leg lengths alone probably could bound 10 yards or better.
I have spent years in these Idaho woods and even though their sign is rampant, have but only seen a few, heard many more. I still wont go out without a gun on my side.
In that same scenario. If I was faced with the solo hunt and a wolf, its the gun for sure. If I am with a friend, then as long as one of us has a bead on it, why not try the bow.
However in that lady up norths case, she never had time to think about what weapon she prefered. It was a split second decision. For those who have been there, instinct takes over faster than you can understand unless you too have had it happen.
The day you stand up and realize that these Idaho wolves are going to be looking you square in the chest,(eyes if your really short), you will then understand they are no game to be toyed with in their backyard. To each their own, however I will highfive anyone who takes one out!
GL with your hunts this year young VF! Always hunt smart and hunt safe.