Separate comment so you can separately downvote/flag me:
Why, OP, why? How much self-awareness does it really take to realize JBR is a non-standard acronym people won't recognize? It almost feels like a superpower that I take an extra half-second to think about what jargon the average person needs to have defined.
Reading the OP, it appears they were pretty much blurting out a semi-nonsensical stream of consciousness. That's my best guess as to why they didn't bother to define JBR, because in reality, they weren't writing for any other audience other than themselves.
Possibly, but I generally see it as a problem from pretty much everyone, especially specialists, speaking to people outside their domain, to be horribly miscalibrated about what jargon the layperson understands, or to just not give it any thought.
Why, OP, why? How much self-awareness does it really take to realize JBR is a non-standard acronym people won't recognize? It almost feels like a superpower that I take an extra half-second to think about what jargon the average person needs to have defined.