Not just when documents are written, but also when the practices they describe are implemented.
You don't need to know a lot of chemistry to realize that mixing organics with nitric acid is a bad idea. Why did none of the technicians doing the work say "hold on, this doesn't seem right"?
My guess, they were afraid to ruffle the feathers of their higher-ups. Yes, that's moronic, but this is the world we can find ourselves in IF the bosses are egotistical kingdom makers.