The idea of a Simulated world is not very different from an illusionary world that the ancients have talked about.
Sorry to bring up NDE's again.....but the idea of a person (spirit-self) getting into a body and experiencing the world and finally getting out of it.... and feeling disconnected with the physical world is also similar to the simulated universe. Getting out of the body is no different from getting out of a VR headset.
Its all converging IMO.
I think you have some sort of fixation with NDEs and OBEs; this is your Achilles heel preventing clarity of reasoning.
Most people think the idea of a simulation is a bit of sci-fi whacko stuff but I think it a better explanation of our situation than theism, for instance. Theism has less explanatory value, is tautological in nature, and is more barking than simulation theory but it has become culturally embedded into our psyche over the millennia so we don't tend to realise how far fetched it is.
Simulation theory can explain observations, it can explain star clusters and frogs and insurance salesmen. Theism and reincarnation both fail to explain mind/spirit or whatever - it leaves them as unexplained entities that enter into the simulation at birth and leave it at death perhaps to re-enter the simulation again in the case of reincarnation. They fail to explain the essence of what we really want to understand. They not only fail to explain the nature of the souls, they fail to explain any mechanism for entry into and departure from the simulation, they fail to explain the apparent developmental synchronicity between mind and body. An octopus has nine brains - are we to imagine that nine souls having some sort of empathetic connection with each other outside the simulation descend into the simulation in tandem and merge seamlessly into the happy product of Mr and Mrs Octopus' union ? Trying to crowbar NDEs into simulation theory only creates multitudinous new problems for it; Mr Ockham would not be impressed.
Simulation theory on the other hand has no such shortcomings, its Achilles heel is that it suggests an infinite regress of simulators who are themselves products of a higher simulation.