it only works with other white collar people who have heard the same jargon, normal people in the real world just won't understand what you're saying, so it's just bad communication
Except that with e.g. technical jargon, the audience is important because non-technical people don’t have the training/experience to understand what’s being said.
With office jargon, I understand everything being said, but the majority of it could be stated more simply and clearly without the use of it. This type of jargon is a social signaling tool, not a useful shortcut or simplification (again, most of the time). It’s also harder to parse for non-native speakers of English.