gnostic
The Lost One
Stellar black holes are stars that at the very least 3 times (or more) greater than the mass of our sun, which have collapsed upon itself, due to its own gravity. More often than not (stellar) black holes occurred between 5 and 15 solar mass.Generally I agree on the description of what is going on.
But IMO everyone who are speaking of "singularities" are misunderstanding something. "Black holes" in galaxies are just the electromagnetic poles into which everything disappears into the galactic center from where it all is re-formatted to new stars and everything else.
That is: There is no "gravity" at play as we understand this. It is a fluent circuit of formation with an ingoing and outgoing motion which is electromagnetically governed. The magnetic poles in galaxies describe the electric current and the perpendicular magnetic field constitutes the galactic disc.
You seemed to be talking of supermassive black holes, which occurred at the centres of galaxies.
And though new stars can or could form in the supermassive black holes, new stars more frequently occurred after supernovas and from debris of supernovas like the nebulae.
The images of Eagle Nebula is famous for viewing the formation of new stars.