Agreed, I was thinking exactly as you were when I read the title. It's a little overblown from what it is, but I suppose it is a working allegory, however it is

Agreed, I was thinking exactly as you were when I read the title. It's a little overblown from what it is, but I suppose it is a working allegory, however it is nothing more than a trick to reproduce the effect. It's akin to calling one of those coin collectors (where you put the coin in the slot and it circles a few dozen times, getting faster as it's pulled down the funnel shape, never learnt the name for them) charities use a black hole (I've actually heard it done). It reproduces the effect, but in no way does it reproduce the cause. An ideal electromagnetic black hole would likely be an extremely strong halbech sphere, either concentrated to the interior or exterior.