>>14422219One of the biggest misconceptions I see is that, for some reason, you restrict the ability to simulate our universe to another universe with the same physical laws/setup. Could mario in super mario bros 3 simulate his world with just the technology available to him in it, namely turtles and mushrooms? Absolutely not. There's a high dimensional, more complex universe outside the 2d-restricted box that is the video game.
Likewise, you can think of our universe as a simpler version of the *real* universe, which has many more complex laws of reality (and probably exists in higher dimensions than our 3D+1 spacetime). We are a much simpler, distilled down physics of the "real" physics in the same way that NPCs in, say, GTA are restricted to a simpler set of physics than our actual world.