I agree with you. This is a really low quality blog post. All the author did was add a fancy graph and some words to something that everybody knows - if a 1-2 good engineers leave, then everyone else bounces out of there.
Not sure I'd call it "fancy."
I've watched corporations chasing out high performers for decades, yet still manage to achieve their goals. They don't excel, and often end up being "part of the road," as Stuart Brand might say, but they never regret chasing out talent, and also never regret chasing talent away at the interview stage.
I know that I nursed my butthurt, with a secret "they'll regret not hiring me!" thought, for a couple of years, and realized that it didn't matter one whit. One or two of the places actually ended up going belly-up, and I like to flatter myself into thinking I could have "saved them" (SPOILER: No, I wouldn't have. They just would have sidelined me, and gone over the cliff anyway, like my previous employer).
Human nature can be very disappointing, sometimes.