It's a term of art. It has a very precisely defined technical meaning that specialists are familiar with and share a common understanding of. Its primary purpose is to permit those educated in the subject to converse clearly and unambiguously with one another in an efficient manner.
It is perhaps not the most reasonable thing to expect specialists conversing with their peers in the argot of their field to reduce all their conversations to the point of intelligibility to the average layman. It's also perhaps not the most reasonable thing to expect all terms of art to be re-named every few decades as language shifts. Never mind the challenges of achieving consensus every time someone wants to rename something.
It is perhaps not the most reasonable thing to expect specialists conversing with their peers in the argot of their field to reduce all their conversations to the point of intelligibility to the average layman. It's also perhaps not the most reasonable thing to expect all terms of art to be re-named every few decades as language shifts. Never mind the challenges of achieving consensus every time someone wants to rename something.