“Study”. Even his best guess is that the singularity self-perpetuated until its stability gave out for unknown reason. Again, one dude, no supporting evidence, coming up with ideas because science is rigorous. Is his idea the consensus? No. Does it even address before the singularity itself existed? No. Why? because there is nothing to go on.
You are literally talking about something the Bible is as relevant an authority on as anyone else. That is why scientists don’t bother with it because it is meaningless to do so.
Edit: Here is one of the better inferences of what happened before the BB and even it boils down to a spec of energy to get the whole thing started.