Maybe that lot on the slope of the volcano wasn't such a great idea after all?
Yeah, tell that to about half the population of New Zealand. Volcano or fault line, take your pick.
It wasn't a great point. We live where we live, for the most part. There are few places free of potential natural disasters. (The scope of the PNW quakes were only realized in the last 20 years or so...).
But it's colossally stupid to build substandard housing in such an area, to the point where it's a net win for society to enforce some minimum quality.
Fires, for instance, are not the Huge Fucking Deal they were a hundred years ago. We have better fire-fighting equipment, but that's kind of the booby prize. Better to make things fire-resistant, and to not cause fires to begin with.