Your baby is ugly.  Yes, conventional wisdom says that all babies are beautiful, but in reality, when babies first come out, they are blue-gray ugly blood and fluid covered screaming aliens with misshapen heads.  Software is the same way.  Your Version 1.0 is an ugly blue gray bloody misshapen mess, and much like the newborn, will require lots of care and feeding to live and be happy and healthy.

I had a conversation with my cofounder about this today.  He was appalled that I would say that v1.0 would suck.  Its the truth.  It wont always suck, but products, like babies, require feedback from the environment in order to grow and develop.