Black hole gravity does close out universes, just not how physicists picture it -- think it -- should do.

[Atlan0001]

Gravity doesn't close out the universe in one ultra-massively ultimate black hole. It does it by way of infinite numbers of local black holes, local points, spread throughout an infinity and eternity of universes in space and time. All of them together, totaled up, is that 'close out' physicists used to think should exist. That 'close out', that 'end', is always existing; has always existed; will always exist, as an ever continuing turn to the eternal constancy of [Big Bang / Planck / Infinite] 'Horizon' of a multi-dimensional Multiverse-Universe.