There is a common perspective that the physical world is computation. That doesn't mean that it's a simulation, only that information is being processed in a w

There is a common perspective that the physical world is computation. That doesn't mean that it's a simulation, only that information is being processed in a way that is very analogous to computation, and it is very useful for seeing it as such. The world we live in is quantum in nature, and so it is very useful to think of the entire universe as a giant quantum computer. In fact, one of the primary use cases for building a physical quantum computer we can program is the "simulation" of natural quantum systems, though that begins to stretch the word "simulation." I'm not sure why you're so accusatory in this comment, but if you want to understand this better, I would recommend "Programming the Universe" by Seth Lloyd