We are what we do
Looking at it from a career perspective and a social standing, we are what we do. Whether you like it or not people define you and judge you by what you do for a living.
People make assumptions about your character, your personality, lifestyle and how much you earn according to what you say you do for a living. What you do also determined whether or not some people want to date you or befriend you.
When people say they are networking often it just refers to deliberately going to a place to meet people that will help advance you one way or the other. So in that sense people are only worth what they can do to benefit others and all they are is what they do.