That's why it is different from just throwing a book into a bonfire, for example. ...His guest agrees with this.
Somehow, it's weird. That information in the book -- maybe a lot of people don't get how natural this is to physicists.
We would say that literally all the information about where the ink marks were on the lettters in the book somehow affects the light and heat and ash that comes out of the fire, and that doesn't seem to be what happens in a black hole.
This is bizarre. First, his claim that the letters affect what comes out of the fire is not something that has ever been corroborated by any experiment or required by any theory. It is almost a religious belief, like believing that the human soul survives death of the body.
But then he jumps to saying that black holes are different!
This is like a theologian saying human souls go to heaven, but then being puzzled about why space aliens from the Andromeda galaxy don't have souls.
Carroll gives good explanations of a lot of standard physics, but then he goes off the rails with these statements that seem to have nothing to do with science. This shows how theoretical physics has gone astray.