Honestly, of the different things I have studied all had jargon that could have been explained in simpler terms, often in shorter common words. So much of it is a wall to the "stupid" people and their understanding.
Other times there are specific concepts with only one word. These need to be simplified and taught to when it is being introduced in journals, but that would be work and very few people have been trained to speak to laymen.
Even within the sciences some shorthand jargon means one thing in chemistry and another in in biochemistry.