As you said. Ice skater.
As the Star collapses on its iron core we have several metals spinning around each other. I would assume this generates an increasingly stronger magnetic field. As the iron starts to fuse into heavier elements might one of them be a rare earth element that increases this magnetism and further increases the pull and further increases fusion of elements into even heavier ones.
On the surface as a interesting thing to me. Could a black hole create some sort of anti matter object in a quantum state that becomes what we see. That they persist for so long because all the antimatter is essentially gone and what little it can generate or accumulate to balance itself is what we see happening. It’s like a computer counting digits in pi but it can’t stop until something changes a digit that causes pi to unbalance and calculate out. Bad example but the equation wants something that’s essentially not in our universe anymore.