You're missing the point. People aren't going to stop thinking that way just because a game tells them to. Some approaches to engaging with a game world are largely independent of a game. You don't have to like that, but its absolutely true.
You’re asserting an opinion here, mine is different. I’ve never had a player in a game with clear and separate designs for players and NPCs that fronts it in the rules be surprised when something happens in the fiction that is different. I have had it come up in 5e D&D. Given that, my going in position is that that sort of open and clear design ethos makes a difference in player expectations.