This is all fringe science. It’s a new conjecture based on a controversial conjecture.

Hopefully someone who understands this better can provide a deeper explanation. I recall at high level why the original paper was not widely accepted.

The paper this is based on is not really hawking radiation because that requires an event horizon. They claimed gravity is enough which is extraordinary claim. Essentially redescribing something that can be more easily explained by other more widely accepted effects.