The goal is to communicate, so I'm going to use the words that mean what I want to say rather than trying to dumb it down. It's the same reason why most if not all professions have jargon; the goal is not to gatekeep, but to efficiently communicate well understood concepts within the profession.

All of which isn't to say that people shouldn't occasionally step back and question whether they could convey the same thing without the jargon and fancy words, but frequently the answer is no, or at least not anything like as succinctly and clearly.