Yes, but if it was the defence spray by the Wolverine, this would be a deterrent to any wandering scavengers. Think of it like the skunk. There is an indication of this being noticed by the search dog's behaviour when trying to disembark the helicopter and their reaction at the tent.
The Wolverine theory of spray is something that could be tested and ruled out but there are a few other nods to a Wolverine. The staining of some clothes on return to families, the dilated pupils , lack of scavengers and more. It is subtle, I agree but it is worth consideration .
I think it is important to look at events from the group's perspective , how they may have perceived any threats, and I've said this before. There didn't need to be an avalanche, exploding rocket, Rock fall or serious snow slab. They just needed to think that it was safer to leave the tent.
I can see only two other options.
1)Staged by outsiders , which leaves a lot of work and logistics to cover up. That's witnesses at airports, fuel, families of stagers , footprints, roaming random Mansi hunters, fighting weather conditions, covering up tracks, leaving nothing behind to incriminate the stagers , the camera's etc .....
2) Someone or people with a gun. It's the only way they could have controlled the group. (Still don't understand why some get to keep footwear and others don't though)