A singularity does not follow the laws of physics! It is beyond our understanding. Our universe began with a reverse singularity event, in the Big Bang, and the nature of the explosion determined all of the laws of how that energy interacts with itself.
When a very Massive Star dies and becomes a Supernova, followed by a singularity, it leaves a black hole as a reminder.
We cannot describe anything about the nature of that singularity as it is now outside the laws of our universe,
But a super massive black hole just happens to be at the center of our galaxy providing us with a rotational gravity which dilates time from our perspective
The largest Supernovae just happen to be one of the few ways in which we are able to determine the nature of our universe. Their bright and consistent light source guides us to understanding our universe.