Think of computer hardware and software.
Both are necessary for the computers to “work” but neither works just by themselves.
Understanding just the computer or just the software explains nothing.
“Science” studies just the hardware.
Whether the computer and software are “here” or somewhere else is another red herring.
I guess I really don’t understand your argument.
I don’t buy the notion that consciousness is merely a product of the brain; and I believe that other animals may have some degree or type of ‘consciousness’.
But the Human is the one that appears to have developed to the point, and with the capabilities, that we have. And unless you believe that we were created out of ‘whole cloth’ à la Genesis, how do you believe we got here, and developed to the state that we exhibit today?