The arguments made against reality being a simulation don't make sense to me. If the universe is simulation, it will be a huge particle system that simulates e

The arguments made against reality being a simulation don't make sense to me. If the universe is simulation, it will be a huge particle system that simulates every elemental particle and force. Being part of that simulation, we would never be able to prove that a reality exists outside of the system that we exists inside. If there is a reality beyond the system in which we exist, it wouldn't have to be anything like system we exist in. There is no reason to believe the system we live in is a model of the one it exists inside!?