@clearstream may have a different reply to make from this one.I’m in disbelief that I’m even having to point out that a d&d persuasion check involving an established cleric that can cast remove curse doesn’t require the player to author anything outside his character, but that a player deciding what runes mean does require the player to author precisely that way.
But as I read @clearstream's posts, the point is quite simple: players in RPGs are capable of (i) establishing immediate goals relating to the removal of afflictions, conditions etc, and (ii) declaring actions that, if successful, will those goals. And those action declarations will often contribute to shaping the shared fiction.
The reason for choosing a generic cleric using a pretty generic spell is to point out that the fictional constraint on the player's declared action is pretty modest, and that the real determiner of whether or not their affliction-removal goal is achieved is the result of their roll. I take that to be the import of this post:
I'm surprised to hear you'd rule out the possibility of a cleric in say Tilverton (while it was extant), if one were not expressly pre-authored there. I've observed DMs agreeing to the presence of NPCs that were not pre-authored. Players regularly migrate fictional possibilities into actualities through their play.
And of course, "established cleric" just means GM-authored cleric. That is the difference, that for some reason cannot be acknowledged!
I would say that "agency over the fiction", in a generic sense, is secondary.I mean, it’s the entire point of doing it that way. It gives players more agency over the fiction.
The most immediate point is to support player-driven rather than GM-driven play. For instance, in the rune example, play is not as you and @Lanefan and other posters have posited is the better way to do it -the players trying to work out what the GM has in mind with the dungeon, and the PCs being lost, and so on. Rather, it is driven by the players' ideas, which include that strange runes might indeed reveal a way out.
And the runes need to say something to be read. And they did!The cleric need to exist to be persuaded!
You get irritated when I post that people seem to confuse fiction and reality, but this is exactly an example of that. In the fiction, a cleric can only be found and persuaded if they can exist.
But at the table, a player can trivially declare "I am going to find a cleric to persuade" without any cleric having yet been authored. And if the GM replies "OK, there are clerics at the temple but it will be DC 18 to persuade one of them to help you", that is completely bog standard. It is unremarkable that the player's action declaration prompts the GM to author some clerics.
More generally, it is utterly commonplace, in RPGing, for fiction to be authored in response to action declarations, although in the fiction that existence of those fictional elements predates the action declaration and is something on which the success of the declared action depends. (Eg a person can't find a cleric if no cleric exists.) The difference between the runes case and the cleric case I described in the previous paragraph is simply that in the runes case there is a mechanical procedure that the player contributes to whereas in the cleric case the GM is responding to a player prompt.
Neither is more or less "meta" or more or less "dissociated". But one is more player-driven than the other.