The singularity at the center of a black hole is presumably equally illusory; general relativity simply breaks down there, giving nonsensical answers (infinities). Singularities are in the map, not the territory. (Am I the first to say that?)
You might be the first to say it that way although the idea has certainly been expressed before. However, we don’t actually know this for sure. We don’t what happens at the singularity in a black hole. It seems likely that are models really are giving something wrong, and there are a handful of suggestions about what might be actually happening, but none of them are completely mathematically satisfying, and the lack of observational evidence is also an issue. We might be able to answer this if we a) had a theory of quantum gravity or b) had some naked singularities we could observe. Neither looks very likely at the moment, with the first probably more promising.
So, I haven’t read that paper by Krauss et al. that you suggest, but they and you seem to be saying that the event horizon must have some special local properties, which seems implausible to me. The event horizon is just a perfectly normal region of spacetime which happens to be such that trajectories on one side of the region will never leave its interior. We could already be inside the event horizon of a black hole, and there would be no way to know it. It seems wrong to consider event horizons to be boundaries of the Universe/Reality. Perhaps I am missing something, and I will look into these arguments in more detail at some point. I am very interested in this kind of thing, and in particular questions of discreteness and infinities in physics (but I cannot yet claim to be an expert).
You might be the first to say it that way although the idea has certainly been expressed before. However, we don’t actually know this for sure. We don’t what happens at the singularity in a black hole. It seems likely that are models really are giving something wrong, and there are a handful of suggestions about what might be actually happening, but none of them are completely mathematically satisfying, and the lack of observational evidence is also an issue. We might be able to answer this if we a) had a theory of quantum gravity or b) had some naked singularities we could observe. Neither looks very likely at the moment, with the first probably more promising.
My take on the issue: http://finitenature.com/no_singularity/
So, I haven’t read that paper by Krauss et al. that you suggest, but they and you seem to be saying that the event horizon must have some special local properties, which seems implausible to me. The event horizon is just a perfectly normal region of spacetime which happens to be such that trajectories on one side of the region will never leave its interior. We could already be inside the event horizon of a black hole, and there would be no way to know it. It seems wrong to consider event horizons to be boundaries of the Universe/Reality. Perhaps I am missing something, and I will look into these arguments in more detail at some point. I am very interested in this kind of thing, and in particular questions of discreteness and infinities in physics (but I cannot yet claim to be an expert).
Am inclined to say: “but that’s why it’s called an event horizon.”