I get the sense that there is a school of thought I’d call “biological exceptionalism”, a belief that somehow constructs made up of many functionally simple units, is fundamentally different and special compared to a similar construct composed of silicon units. I can’t see how someone could hold this belief and be a materialist (I’m not implying you are btw). Biological exceptionalism surely implies the existence of a “soul” or “spirit” (which raises a whole bunch more questions).