I mean the universe in a black hole is one of the more common ideas in physics, though we don't have any evidence for it. So it's not surprising people pick it

I mean the universe in a black hole is one of the more common ideas in physics, though we don't have any evidence for it. So it's not surprising people pick it up and run with it. With that said, when the universe was younger things were way way closer so would it be possible for things like very early massive quasars to inject powerful magnetic fields in the otherwise dark universe at this time and bias matter falling into galaxies to one direction or another?