And also, they are not supposed to use their intuitive ideas about what is and what is not dangerous use of software. When they do use their intuitive ideas, hacks happen. Karen here doing what she was told and accepting only formats that her organization security team told her to do is Karen doing the correct thing.
We are on HN. People who are responsible for overreaching unreasonable security rules ... are basically us. And we are all paid way more then Karen, but are the first to call Karen an idiot when the hack happens. Karen does not know why pdf is different from doc or whatever. Nor is she required to know.