Something the author didn't mention (or maybe it's simply a specific case but I think demands explicit mention) is that it lowers the barrier of entry for new employees.

I started a new job ~2 months ago and things that everyone thinks everyone understands I simply did not. These weren't documented acronyms but rather "socially understood" acronyms that meant each time I didn't understand something I had to message someone asking.

While onboarding the amount of times I message people asking for help is so much that it gets uncomfortable (for me, at least) so minimizing the acronyms would be super helpful.

As a counter-point, though, it could be that each culture/tribe needs their own language that only they can understand and it creates this feeling of comradery? Just a thought.