Comment by glial
I appreciate your analysis, but another way to consider this discussion is that asserting the existence of "rights" is an unsupported conversational maneuver that frames the debate. The grandparent is defining a concept into existence, which is a questionable move IMO, despite being tradition.
All you have to do is recognize it as a statement of opinion. It’s not a “maneuver”, it’s just an argument, and you can disagree with it.