Certainly, but I think physicists realize that is a smaller issue than the fact that, without something theoretically like black holes, their entire model of cosmology ceases to be of any use in describing observed astronomical phenomena...
They don’t have to reconcile GR and quantum mechanics, in fact, they have gotten along quite well for decades without doing that. They do kind of need to have a model that at least seems to explain the movement of planets, galaxies, etc, consistently, even if that model relies on several obvious “fudge factors”.
“Next, Alice measures the total angular momentum, or spin, of the black holeâ€â€both its magnitude and, roughly speaking, how much it lines up with a particular axis. With those two bits of information in hand, she then tosses in her electron, losing it forever.”
Ummmm.....doesn’t her measurement also force the collapse of the black hole’s cumulative wave function? :)