There is! In the first case, you work with colleagues who may become friends, you learn how to treat people and build stronger relationships. The "cog in [a] commercial operation" quip is an abstraction. Generally, people have relationships with their peers and are not "cogs."
Whereas on the other hand, the sex worker deals with people who treat them badly precisely because they've paid to do that. They even enjoy it. This is a twisted model of human relations, and the sex worker is both the enabler of that awful exchange and has a target on his or her back.
So the progressive "view" of this thing is absolutely insane. It's constructed from a position of privilege where the reality constructed by toying with such ideas need never be encountered.