When discussing this topic, one must talk about the policies regarding mineral extraction in Zone 019.
Zone 019 has relied on exporting gemstones to develop its economy for a long time, but in the early days of mining, it did not have the technology level it does now, so many problems were deliberately or inadvertently overlooked, such as whether mining would cause geological issues and the corresponding remedial measures.
Some large mines require long-term development, and mining equipment and plans can be gradually replaced, so safety is naturally not a worry. However, in some smaller places, it's a one-off deal where everything that can be profitable is extracted, and issues like mine collapse or other problems are not considered. Since these places are far from densely populated cities, if something does go wrong, as long as it doesn't have a major impact, resources will not be spent on repairs later.
