I doubt we are going to be completely in the dark about these creatures even if we kill it, and we can go hunting for more if we really need to.
So, what we are actually risking here?
Possibly relations with our neighbours, yes, they are so weak we could just destroy them with relative ease, but i would still very much prefer to start at the strongest and most positive footing we can, and not just because i want beaver bureaucrats with tiny clay tablets and official hats.
Because, no matter how useful the information would be, who here would appreciate that argument if someone did the samekind of gamble with mom and Biyu?
Also the clay tablets, these people have potential first hand accounts from the time of the Weilu, and they have already lost some of them to these attacks, do we really want to risk more?
The prison is already hanging by a thread, i don't expect a fight here to break it, but i could see it being part of the collateral damage making it more time critical to fix or otherwise deal with.
I just don't feel the potential gain is worth the risks to our goals, let alone in a more general public safety sense.
We are in the middle of a village, where we are guests, and i don't want us to take risks with lives of other people when we don't need to or have a strong pressing reason to do so.