Carbon is a way better chemical for life than silicon. It can form vastly longer chains and produces IIROCC (if I recall organic chemistry correctly) much more

Carbon is a way better chemical for life than silicon. It can form vastly longer chains and produces IIROCC (if I recall organic chemistry correctly) much more robust bonds. Additionally we find organic molecules everywhere from comets to gas clouds in galaxies. We don't really find as much interesting silicon-based chemistry everywhere.