I'm familiar with this sort of approach to resolution. My point is that it is at odds with the approach to setting that is set out in the post #60).
Not at all, me and OP actually are saying the same thing.
Hes emphasizing the angle that Players can't violate the Don't Be a Smartass rule and can't just will adventure breaking things into existence because they made the math rocks go click-clack.
Im emphasizing the angle that such things can be introduced within reason, and that there's no need to build changes on the fly if they can't pass whatever check. And I emphasize this in the context that the stated example is just too goddamn inconsequential to be a stickler over it.
If the example was, as I alluded to, about willing into existence magical Wish-granting berries that grow over all the place,
that is something Id deny, no question, because of course thats stupid, gamebreaking, and not a serious suggestion.
But even at a less extreme end of things, if the stated example was, lets say, presented narratively in such a way that it logically follows that there is only ever going to be one specific way into the building, then yes, rolling for a secret entrance isn't going to fly.
But
that is going to be predicated on the PCs having already gone through the process of learning about this building and how precisely it came to be this way, and ideally this will be in tandem with a bunch of other research and investigations tied to the BBEG or whatever the adventure is about, and even then, those Investigations should still have had a chance to provide another way in.
If one just presents a tower with only one specific way in and denies any chance to engage with it beyond that one way, then thats just bad writing and bad worldbuilding at that.