To be fair even our attempts at describing a technically possible but implausably simple version of a blackhole are essentially educated speculation. Although worth noting that black hole like objects did appear in fiction before they were discovered IRL.
Edit: To clarify our current models tend to involve non-rotating and un-charged black holes and even then there’s significant conjecture as to what happens beyond the event horizon.
To be fair even our attempts at describing a technically possible but implausably simple version of a blackhole are essentially educated speculation. Although worth noting that black hole like objects did appear in fiction before they were discovered IRL.
Edit: To clarify our current models tend to involve non-rotating and un-charged black holes and even then there’s significant conjecture as to what happens beyond the event horizon.