How does this economy even function. If dungeons are disasters that need to be dealt with (or at least have people sent in with the sole purpose of culling threats) then it doesn't make sense to keep this new one secret. It'd make sense to want dungeons cleared ASAP because they'd just be a net...
Well, to be precise, this version of him...Okay this isn't really a spoiler because he explicitly gives an explanation in writing in this very chapter, but it's played for laughs so it might not be clear at first read how serious he's being.
Personally I just find it mildly refreshing to see one of these stories let their villainess be, well, a villainess. Half the time they just make the character completely blameless.