Freedom to associate is fundamental in our society. Being forced to perform a service takes away one's right to associate with whomever one chooses.  Isn't that coercive use of the state something that we, as Americans, abhor?  I've never understood a person who wants to force another person to perform a task or service against their will.  In fact a coerced contract is no contract at all.   It seems like a step in the wrong direction, a step towards enslavement.