There is a wisdom in this beyond the rules of physic: a man's own observation what he finds good of and what he finds hurt of is the best physic to preserve health. ↗
There's probably more history now preserved underwater than in all the museums of the world combined. And there's no law governing that history. It's finders keepers. ↗
If you had a national grid with one operator, you had twenty or even a hundred operators, if you don't have the ability to compel people to observe high standards of conduct, then you run a greater risk. ↗