To be fair, there is absolutely nothing within known physics that would explain why we're more than a complex biological computer and how subjective experience and qualia arise from it.
So we genuinely cannot even begin to guess as to what actually imbues consciousness into our neural processes. It could be anything from "it's actually just the physical processes" through "there's a soul piloting our brains by influencing quantum noise" to "the brain is basically an antenna for our metaphysical self and death/disability is the loss of connection"
There's currently no reason to assume that we're more than a complex biological computer - while it's indeed interesting to explain how subjective experience and qualia arise, it's certainly plausible that this can arise as emergent behavior once a specific type of computer is doing a specific type of computation, and we 'just' need to study that complex computation.
Unless we obtain any evidence whatsoever that this can't be the case, Occam's razor would suggest that this is the hypothesis to explore, without looking for new physics or other unlikely assumptions.
> why we're more than a complex biological computer
Are we more than biological "computers"?
I think we are complex biological systems that we do not fully understand yet but that does not mean anything supernatural or beyond our understanding of physics is at play.
So we genuinely cannot even begin to guess as to what actually imbues consciousness into our neural processes. It could be anything from "it's actually just the physical processes" through "there's a soul piloting our brains by influencing quantum noise" to "the brain is basically an antenna for our metaphysical self and death/disability is the loss of connection"