In fact how could the universe NOT be a black hole?!?!
It started out really, really dense and supermassive according to the big bang theory! It must have been a black hole originally. Why would it not be a black hole now? It must still be a black hole, but slowly increasing in mass and interior volume via the creation of virtual particles, adding mass to itself, and adding interior spacetime by equivalence. Hence the expansion.
I'm having an epiphany! ....
