Well, yes, but fairy tales act like the aristocracy are Better (or at least that the best people to run things are kings, even if they're ex farmboy kings) because that's what people genuinely believed back then. It's quite different to replicate the dynamic as someone from a democratic, theoretically egalitarian culture. And you're right, I think modern fantasy is often more classist than the older stories, because the people writing it are choosing to romanticise a classist past. In the same way that regency romances are often in some ways more classist and sexist than say Austen, who didn't write about old fashioned upper class men because they're sexier than feminist working class men etc, but because they were literally the only kind of man she could imagine her protagonists marrying.

You can have compromise and consensus building as well as conflict: you don't have to (and probably can't) build consensus with everyone. Look at the civil rights movement, feminist movement etc. Plenty of conflict there! (Though stories about them still often focus on The One Person Who Changed Everything, regardless of whether or not this is a accurate reading of history) It is harder to write stories that don't fit the same old tropes, and certainly there's a place for old fashioned stories about princes finding their destiny etc, but it would be nice to have more variety!