it makes it really easy to be immortal or get resurected.

Your consciousness, feelings, sensory input, and your entire character can be massively affected (even controlled) by the bacteria in your gut (which has its own separate nervous system), or by parasites.
It’s not as simple as measuring the electric signals between neurons in your brain.
What you feel, think and do is often fully controlled by processes that happen elsewhere in your body. And your consciousness just comes up with a reason for your behavior after the fact.