I feel like this is a modern version of believing in souls. You are matter, not data. If you find a way to simulate yourself on a computer, this will not prevent you from experiencing death. And if that's the case, what's the point? Stroking your ego with the knowledge that a simulation of you will stick around for some time after you give up the ghost?
I think it's the opposite. Believing that something special exists in brains that can't in be replicated in a (sufficiently complex) computer is spirituality, a belief in the supernatural.
Rather, confusing models (including computational ones) for the things they model is the very definition of magical thinking. Matter matters. There is nothing specific about "brains" that prevents them from "existing" digitally. The fact is that nothing material can "exist" in a computational substrate. A computer can only simulate: replicate the structure of material things in a useful to us manner using symbols.
I feel like this is a modern version of believing in souls. You are matter, not data. If you find a way to simulate yourself on a computer, this will not prevent you from experiencing death. And if that's the case, what's the point? Stroking your ego with the knowledge that a simulation of you will stick around for some time after you give up the ghost?