Ah, this seems to make sense, thx! Pity that this extended rationale is not present in the original article. Actually, this seems to render the article's claim rather unfair in laying the blame on screen readers ("[screen readers] read ‘eg’ incorrectly"), as it appears it should be rather "we have many errors of 'eg' instead of 'e.g.' in our texts, and they're too hard to catch for our editors"

edit: personally, I don't have to use a screen reader, but I do read words "aloud" in my mind when reading, and I believe seeing "eg" or "ie" without dots would make me stumble mentally too...