Meaning

He has a job to do.  Collect and clean up the dead.  Most people shun him because, as they say, anyone who would work such a low-level disgusting job must be of low-status.  Nothing that should be associated with.  He doesn’t see it that way.  He’s good at his job and he takes pride in it.  Anything worth doing is worth doing well.  What’s most important is what you think of yourself.  Not what others think of you.