Your brain doesn't experience computational processes any more directly through VR: VR works by sending controlled physical sensations to your senses using the same routes as when you ordinarily interact with the world.
Sure, but your brain mistakes lights flashing according to a computational process for light flashing according to a physical process. It's not an argument that you are directly experiencing maths, just an example of how easily our brains can get maths and physics mixed up with the hint of a suggestion that if it's so easy, then perhaps there's not as big a distinction as we might think.
