How about when we find out, that gravitation
can not bend space enough to stop a lightwave from
escaping.
Then black holes would not be possible.

And as gravitation is not even explained yet, I wonder
why everyone preassumes that black holes are a fact.

Thats also why the question about super small black holes.

In these dimensions, quantum mechanics rule,
making the current rules of relativity theory not appliccable.

So how can black holes be derived from relativity theory?