I agree. The linked examples of jargon in the article feel more like precise wording chosen to reflect legal or contractual obligations. Not great for casual communication, but when you start talking about people's job duties and working hours then precision is important.

Always consider your audience. If you're writing casual communications for a mixed audience, ditch the jargon and use simple words.

If you're speaking to professional peers on business matters, use the precise language. Don't unnecessarily complicate sentences or use complex words when simple words are equally effective, though.