Well lets look at the two cases - take pickpocketing and the comment quoted you were responding to...
"They won't tell the PCs what the statue is until directly asked. They won't allow a check to notice/prevent a pickpocketing attempt unless the PC is in a specific stance. Absent a player's positive action, the information remains undiscovered. Under my method, the players will receive the information if an appropriate fortune check is passed (which could be automatic if the math works out) without requiring any positive player action."
cIn my case, without the PLAYER stating they are in a certain stance, whether or not the info is given is determined by a check that depends on character abilities, situation etc. The character has a chance due to his abilities to notice the event and react to it without a specific keyword statement being made by the PLAYER. Success or failure is determined by the in-game stats - which can include auto-success and auto-fail. If the player describes specifically some type of deliberate action with effects that alter their chances - it might lead to advantage. if they describe some other effort or focus, it might provoke disadvantage. (Example being if they are focusing on an effort to see if someone is lying - insight check - especially with a progress with setback result Another example would be if a commotion started just out of sight and the character was descibed as pushing quickly thru crowd to get to the place or a clear view - again might be disad - might have been the point of the commotion too.)
On the other hand, if in order to have a chance, the PLAYER must state there characters are [insert keywords here - stance whatever] - then you have a case where its on the player preemptively to even have the character have a chance.
One recognizes general character comptence - the other focuses on the player basically GM-proofing his character with descriptives.
Much like ye olde "you did not say you looked up before the macguffins dropped so you did not notice the things on the ceiling"