I think that the point that
@FaerieGodfather was making is that since it’s all made up, you could just as easily create the fictional circumstances that don’t ruin that players fun.
In other words, the “logic” you’re applying is made up and you can make up another.
Especially when the "logic" in question doesn't make nearly as much as sense as some people seem to think it does.
Like, for instance, people may believe all kinds of horrible stereotypes about goblinoids, they might even
fear and
hate goblinoids on the basis of those stereotypes-- but they're not going to organize a lynch mob to murder
the very first goblinoid they've ever seen on
the very first day they've seen one, while he is heavily armed and traveling in the company of other heavily armed, magically gifted individuals.
You'll get a lot of stares, warding gestures, people hiding their children. People might throw stones, actually, but a proper
stoning requires a crowd. Gate guards might refuse access, city guards might demand "proof" you have the right to be there. Businesses will deny services, or only serve you through the back door.
You
might get a lynch mob, after you've been in town for a few days, when someone-- usually a young woman-- accuses you of a crime, usually of a sexual nature.
People like to say prejudice is borne of ignorance, and this might be true, but
actual violent hatred requires enough time for familiarity to breed contempt.
Note that everything I just described applies to
any humanoid... including the supposedly Good and/or Neutral ones. You don't usually see the same kinds of DM behavior with exotic elf subraces-- when the local "Chaotic Good" elves murder anyone who enters the woods-- or with different human ethnic types, even when those humans frequently engage in raiding against the locals.
One of my biggest problems with D&D is that a lot of DMs engage in all sorts of naughty word behavior-- ranging from petty dickery to arbitrarily offing PCs-- in the name of "realism" when it's apparent they're not even on a first-name basis with reality. They simply have no clue how the real world even works.