I'm curious what you mean by this. We already know with confidence that when feeding, black holes emit relativistic jets from their poles that reach distances of tens of millions of light years. How could those not affect the environment around them?

As far as if the SPECIFICS of how they work are exactly as the author surmises, I think that's something that has to come in the simulation phase once the theory is adopted and tested more thoroughly, and absolutely shouldn't be something a theory should have to establish before even being properly considered.