Common Sense:
Even though what we know of black holes are theoretical... it still stands that Black Holes are much bigger than what any human, even at their "most spiritual" can conjure up. Does anyone here think they actually could ever have the ability to move as much energy as the Sun in our Solar System? If not, then what makes them think they would have the power to counter-act a black hole?
Even when it comes to higher dimensions and spirituallity and magick we do not know everything. So you have to use a little common sense here. If you are still performing Magnum Opus's to ascend, still getting "new information from Satan," and other such things, could you really say you are competent enough to verify and say something like "I can go to a higher dimension and escape a black hole" without actually having verified it?
There is alot of QUACKERY in the spiritual and magickal fields, so I would take alot of it with a Big Grain of Salt. So lets revisit the basics here:
1. Theoretical Blackhole Construct vs Smaller human construct.
2. If you go by the theoretical construct and empower it with alot of energy vs the human with little energy the Theoretical Construct wins.
3. This goes to show that basically the person (in the real world) who has the most powerful aura always wins. Thats pretty much a given.
So can a soul escape a black hole? No one really knows, because no one has even gotten close enough to a black hole. Its all theoretical science. But when it comes to doing magick in the Real World, having a more powerful aura brings up your success many fold. Its a pretty solid principle that having bigger numbers or greater power will more likely make you more successful than if you have less.
The thing is, the soul is a higher dimensional existence. It doesn't reside on the physical, therefor it doesn't interact with a black hole.
So yes, a soul would easily escape a third dimensional black hole as it cannot get trapped in a third dimensional structure since a soul is a higher dimensional existence.
Black holes however, like everything else on the third dimension have an astral counter part, I do not know what those are or how they work, but with what we know of the physical characteristics of black holes I think it is safe to assume a soul cannot escape or even come near the astral or higher dimensional counter part of a black hole since it's characteristics should be simmilar to a degree and massively scaled up as everything on the higher dimensions manifests in much greater magnitudes.
Perhaps a more powerful astral being, or a being on the level of the Gods can escape it or get near it, but for a human soul I think it's impossible to get close to such an astral black hole counterpart.
A black hole is not a black sun however, as The black sun is an astral counterpart to the sun, it's not a three dimensional thing.