Thinking about how so much matter can be squeezed into a singularity, the answer (if I understand correctly) is that the matter just stacks upon itself down an infinitely long weird space-time well. In a sense, the last item in masks the ones below. But doesn't this impact the gravitational heft of the black hole ? The matter at the bottom of the well, it seems, should behave gravitationally as if it is farther away from the surface that we experience. If so, the black hole should "weigh" less than the sum of what went into it, so in effect matter would appear to be lost, gravitationally speaking. And if that's the case (long shot), does it impact the calculations of dark energy ? The assumption has been that matter is not destroyed, but what if it is being "masked" by the black hole, so that over time as more matter falls into black holes there is less gravitational energy restricting the expansion of the universe ?