Yeah, I may be wrong but I think it usually comes down to a very specific kind of precision needed. It's not meant to be hostile, I think, but meant to provide a domain-specific explanation clearly to those who need to interpret it in a specific way. In law, specific jargon infers very specific behaviour, so it's meant to be precise in its own way (not a law major, can't say for sure), but it can seem completely meaningless if you aren't prepped for it.

Same thing in other fields. I had a professor who was very pedantic about {braces} vs [brackets] vs (parentheses), and it seemed totally unnecessary to be so corrective in discussions, but when explaining where things went wrong with a student's work it was vital to be able to quickly differentiate them in their work so they could review the right areas or understand things faster during a lecture later down the line.

But that noise takes longer to teach through, so if it is important, it needs it's own time to learn, and it will make it inaccessible to anyone who didn't get that time to learn and digest it.