Why? Excellent question. You should always ask that question, even if you think you already know the answer. You will find that a great many things are far deeper than they appear.
Final goodbyes are for the people left behind. If you were there, it was enough.
Madness string 4384
I think that anytime we encounter a singularity, it is most likely a mathematical issue. Which means our model is not complete. I think there is no such thing as an actual singularity. And I think quantum would not even allow that. My thought is thus that time goes really, really fast, but not instantaneous.