I tend to agree with you. Are mathematical singularities physical? We just don't know. I think probably not on philosophical grounds. But we can't peek inside a

I tend to agree with you. Are mathematical singularities physical? We just don't know. I think probably not on philosophical grounds. But we can't peek inside an event horizon to find out, and these event horizons seem to exist, so whatever the structure of the insides of them are, they're still black holes.