You have that entirely backwards
There is a faith based belief that consciousness isn't a result of biological complexity and that it's somehow this outside 'thing' that puppets our bodies from a pretend alternate reality plane.
We can use science to figure out how a couple pounds of meat can use a complex set of interconnections to model the physical universe, and we can use faith to believe that fragile and delicate process continues somehow, without any physical explanation at all, unabated after the meat substrate is a dead bit of human jerky.
Death is scary, and denial of scary things is a very human trait. I'm comfortable with the idea that I die every time my head hits the pillow and the consciousness of the day has flickered out. When I wake up a new me is born out of the data saved in the meat, kind of like lighting a candle twice will show the same shape of flame because the wick was the same for both fires; that doesn't mean the first candle flame continues at the next lighting, just that the new one is close enough to the old one to fool everyone else including itself.