Those who work in certain regulated industries, most especially the pharmaceutical field, know that labels are important. In fact, companies have people who do nothing but manage the labels of their products, and the language on them. This is because a change of even the positioning of a comma can require going through a regulatory re-approval process.
While this might seem like a lot of bureaucratic hassle to some, the reasoning is that a minor typographical error on a label can cost lives.
There are many aspects of life other than technical communication where this is true, and I have recently had the sad occasion to experience one case.