Humphreys’ model is not untestable. It stands up to all observations without any need for things that have not been observed, like dark matter. It also has no argument with any part of God’s word.
Having all the mass of the universe collapsed to a point would be the ultimate black hole; nothing would ever bang its way out of that, that would be a final condition.
Likewise having a supposedly omniscient God suddenly 17B years ago deciding it would be cool to create a universe where none had existed previously is nonsensical; why wouldn't he have figured that out 17 trillion or 17 quadrillion years ago.
The long odds are that the universe, like God, is eternal, and the creation stories you read both in the bible and in other antique literature refer to the creation of our own local environment, and not the universe.