With respect I think there's an element of trying to preserve the mystery of the stage magician's techniques in your position here. 'Don't peek behind the curtain'.
Yes the 'play to find out the contents of the GM's notes' description is very reductive. Yes it leaves out a lot of the depth and nuance of actual play. But it's also fundamentally accurate.
If we are to profitably discuss the merits of different playstyles, rulesets, and approaches, then we must first be honest about their fundamental character.
I don't think anyone is saying there is something wrong with this kind of play, or that it's hollow, or artificial. i think it's a perfectly enjoyable and valid way to play and it describes a good chunk of my GMing.