Jeez, why didn’t I think of that?
Quantum Foam ? Don’t they sell that at the Home Depot ?
I myself have thought about it constantly since an incredible analogy was first put out there several years ago; namely, that spacetime itself flows into black holes. And once it reaches the event horizon, it is flowing inward faster than the speed of light. That's why even light can't escape: the space in which it is embedded is flowing inward faster than c, while the best it can do is c outward. So it is carried in. Note this was only supposed to be an analogy to help you understand! Now it appears it may be something more than that.
Because you did not observe the black hole in the center of the Milky Way growing in mass at a rate of 0.001 solar masses per year!
The last time I used quantum foam peanuts to pack a box for shipping it ended up in the Alpha Centauri Galaxy.