I was thinking about that. All we know about the gates comes directly from Soon. His version of Kraagor's death made it seem like there was no choice, yet Girard implies that there was a choice of who was going to "die" in that sealing, possibly due to how it had to be sealed.
There have also been no first hand accounts of anyone looking into the rifts outside of Shojo's story. And in the story, we hear that animals were "disappearing", not turning up dead. It's becoming more and more possible that the nature of the Snarl might be a bit different than previously thought, and Soon wanted to do something the others didn't approve of. For all we know at this point, there's no Snarl at all.