It’s statistically unlikely to the point of being impossible in any kind of realistic scenario. Still a neat thing to think about tho

to clarify, the thought experiment of entangled black holes having connected interior spacetimes is not intended to be understood as something which could occur naturally. It’s intended to illustrate the notion that the structure of spacetime itself might arise from entanglement interactions. i.e. the explicit emerging from the implicit.

Speaking of thinking dialectically, it seems clear to me that black holes embody a synthesis of the seemingly contradictory quantum and gravitational theories, and that moving our physics forward in a synthesis of those theories is helped by studying them.