what other option do they suggest? If they find a way to teleport her out of there without going there, sure, but other than that…
Well, an example might be going to the capital city and negotiating for the princess release...where the players are just improving from thin air all of that. Or the players want to hire someone else to do it....and assume they will automatically do it and then come right back to the PCs.
That's the big thing. The DM needs to examine why he's saying no. What is the reason to do that? I think if we self-examine these moments rather than just rely on play assumptions from past experience, then maybe we can get to the actual issue.
Why does a DM decide to choose his prep or his sense of what makes sense or any other reason over the player's idea?
The most common reason I say no is the player(s) have a weak, half idea that would only work in a very dumb cartoon or such fiction.
Second is when the players put no effort or work into an idea. They just say "whatever" and want a Win Button.
Third is when the player makes a wild crazy assumption about something in the game world AND they want to game world reality altered to whatever they just said on a whim.
Fourth is when the player makes something they want to happen/not happen a "One Way" sort of thing...more 'bending reality' here.
Fifth is when the clueless player makes a clueless plan that simply will not work ever.
We could perhaps just agree that 5e's backgrounds are poorly thought out and explicated, and could do a much better job of spelling out what precisely they do.
Very True.
It's great to give players the idea that "backgrounds are cool", but they need more then a quick drive by of text.
This is where "Be a fan of the players..." comes in.
And this is where I have the problem. The Fan/Buddy DM.
The player just yaks on how they "know another rich noble who gives them free money". The Fan/Buddy DM just says "ok, " and the player just writes down any amount of their sheet.
As I am not a fan/buddy DM I's say, "nope, no free money for you", and the player will complain.
If someone takes the noble family we'll discuss all of this before the first actual game session starts. Just like I'll discuss details about a contact for a criminal and so on. Nothing in the PHB is going to override world building and basic logic.
I use the common sense that your only a "noble" in and around your home area...and mostly near by places that are part of the same society. But a lot of places don't recognize the nobility of your place. Plenty of places have no idea of "nobility" in their society and/or won't see the crazy murderhobo self insert player as any kind of "noble" person.