Even in STEM, there is tonnes of obscure jargon. Much of it also sounds like it could mean something you are familiar with. Think of all the words in theoretical physics: strings, worldsheets, bubble nucleation, or just plain energy and action. Yet no lay person could hope to follow along if reading one of the "seminal works". That is just the nature of specialisation. And there is often plenty of ambiguity in there too, despite the efforts to avoid it.