The black hole model used here is the elephant in the room, namely the no-hair conjecture. It's derived for the classic black hole, which has a problem that it'

The black hole model used here is the elephant in the room, namely the no-hair conjecture. It's derived for the classic black hole, which has a problem that it's assumed into existence and has no means of formation (collapsars are only asymptotically close, but not exactly classic black holes, they are furry and the no-hair conjecture doesn't hold).