Communication requires thought and input from both sides - if I use a numeric abbreviation with someone who is unfamiliar with it, I am communicating badly.
I think where we differ is that I see such abbreviations as no worse than any other - TLAs (three letter acronyms) can also be as impenetrable.
What?!?! I have never heard anyone pronounce these terms in such a ludicrous fashion, and it’s not because I don’t have exposure I do a fair amount of work in this space.
Or the writer could keep their writing more accessible by using the word accessibility, understood by hundreds of millions of people, instead of some meme term understood by maybe thousands.
(Lack of an obvious pronunciation is a good objection, tho.)