I take your point, but one of the things that's going on this expectation of being catered for and made comfortable, which is more available to members of some cultures than to others. The complaint of 'lack of realism' is tied to a definition of reality as it's experienced by the speaker -- and the associated demand is that fantasy realities conform to their expectations and norms.
Now, some of this is also down to personality. I love to learn new languages and structures, and I revel in things like honorifics and nicknames: they don't confuse me (this may in part be that, as a mediaevalist, I'm used to names and so on that aren't standard to my daily life). I use them sparingly in my fiction, because I don't want reading to be a chore. However, I reject the notion that I *have* to conform to the rules of a western -- and quite US, at that -- definition of realism in order to create a convincing world.