Thanks for letting me know I wasn't clear! I'll try to answer your question and explain my point differently.I'm not following your argument here at all -- it appears you're arguing for a different approach based on the the idea that the DM may fail to present a scene adequately, and so asking for rolls is a way to protect against DM failure to properly present the scene?
In an open-ended game like D&D, I don't see how it would be possible for a DM to always be able to predict what the PCs will find important to be able to include it in an upfront scene description. Sometimes a PC will have an idea the DM didn't consider (and therefore didn't include all the relevant information for evaluating that plan), or it could be the PCs take the entire scene in a completely unexpected direction (rendering moot the DM's analysis of what information is important). I wouldn't classify either situation as a "failure to properly present the scene" on the part of the DM.
As a trivial example, a PC could deliberately change the topic of conversation in a non-confrontatinal social scene and watch for whether the new topic appears to make the NPC uncomfortable. Since the scene had been framed as non-confrontational, the DM hasn't yet had a reason (or opportunity) to telegraph that the NPC is/isn't concealing their emotional state, so the PC doesn't have anything to unique to this situation to structure their action declaration around. Accordingly, they'll probably go with something generic when describing their approach, like "... by watching their body language for signs of discomfort".
On the one hand, the PC declaring a goal (find out if NPC has knowledge of topic x) and an approach (by changing the topic of the conversation to x and watching their body language for signs of discomfort) seems to be exactly the sort of thing the PC should be able to do in Goal and Approach. On the other hand, the described approach isn't specific to some unique detail telegraphed by the DM (because the DM didn't know that such would be relevant or have an opportunity to include it before the player altered the scene) and would apply to just about any similar situation.
My question is, do you consider permitting an action declaration with a generic Approach to be in keeping with Goal and Approach as you see it? If yes, how is permitting a generic Approach functionally different than "pushing the Insight button"? If no, does that mean that under G&A certain types of actions (e.g. reading the emotional state of an NPC) are only available to the PCs when the DM accurately predicted that such actions would be important to them and included appropriate telegraphs permitting situation-specific Approach declarations?