I think we're talking about a few different things and they are getting a little conflated.
When I think of reasonable players and staff having differing expectations. Sometimes it's just a lack of clarity in what a game should be, where it's hard to present detail that would clear up misconceptions without overwhelming someone looking at the game. But sometimes it's just players wanting to add something that the owner never thought of, or considered, or take things in a different potential direction.
And if everyone's reasonable, then either the staffer can decide it's something they'd like to see and expand it, or it's not something they'd want to see or aren't interested in and decline to add it to the game, and then a reasonable player also doesn't badger the staffer, and is polite and courteous in bringing it up, and the staffer is polite and courteous in hearing about it, even if 20 different people have also suggested it 20 times before and it's getting really, really old.
The unreasonable ones are disciplinary stuff, and I think a different scope of discussion. But I think the, 'people after different kinds of RP' is an entirely different discussion from either of those things.
As a hobby, I don't think it's any secret we have a whole hell of a lot of introverts or people with social anxiety, and I mention this because it is not exactly hard for someone to just not get invested in a game. Someone plays, they get one RP partner, that RP partner quits, and maybe that player logs in once a week ever after and just idles in their room for forever. They just aren't engaged, and a lot of them linger forever kind of hoping someone else engages them, because going out and creating that engagement is very challenging and frankly scary to a ton of players. And more often than not, someone stuck in that position, of maybe finding a single thread of RP they value... those people are going to be written off by other players, generally unfairly.
I'm not like, a brilliant storyteller or writer or organizer, but I do think I might have a knack for engaging with people that are having trouble finding footing, which loops back to that other conversation about social scenes, and people's differing value in them. I think more often than not, a lot of players that are written off by other players as having niche interests just need to be engaged with, and they will respond accordingly and get invested in the game. I strongly think that the 'person that plays a game not meant for that kind of RP and refuses to engage' is so rare it might as well not really exist, but the 'person that has no idea how to get involved' is overwhelmingly common, and probably one of the biggest single issues that any game runner deals with.
It's super, super important to not mistake the latter for the former, in my opinion.