Many people who are in a position to write opaque jargon lack the perspective that would be required to explain it to a person who isn’t already very well-versed. Math articles are often like that, which doesn’t surprise me. I’ve had a few math professors who appeared completely unable to understand how to explain the subject to anyone who wasn’t already good at it. I had to drop their classes and try my luck with others.

I feel like a few of them are in this thread!