No flips for you!
What a strange thing to say, in this way. Of course it doesn't. It doesn't claim to. No one has ever said, to my knowledge, that GNS is all you need or want. This is beating up a strawman.This is one reason to have multiple design models for games. When all you have is one model, one theory, around game design, you miss aspects of games. GNS theory may tell you how well your game appeals to desires for G, for N, or for S. It doesn't help you meet other desires the players might have. Today, this would include identity desires, but won't be limited to that.
As a highly relevant example of today - GNS theory doesn't inform you about design theory around making a game appealing for remote play.