GNS is bullshit, and makes the most useless people feel as if they are justified in making, running or playing shitty games.
If you're one of the three, you have a hard time being the other two. Yet if you are either of the other two, you can do all three. Well.
With a Gamist game, you can still Tell Stories and have the game Simulate the world you're trying to create.
With a Simulationist focus, you can have a balanced game and tell stories.
With every Narrativist focused player, DM or system, you can't have a balanced game (not the focus to have balance, remember?), nor does your game even begin to simulate the square story that you've been trying to hammer into a round hole (since the rules are based on bullshit, not hard math).
Seriously, every Game-Balanced and Simulation-Focused game that I have run has had more credible, more outlandish and less hackneyed stories than and of the "Narrativist" stories that I've heard from anyone elses game.
Railroading "storytellers" can go drink hemlock tea for all I care. I find their games offensive, unbalanced and most importantly, the one thing that they are trying to do, tell stories results in the most unforgivable of crimes. They fail to tell good stories. Always. With such a great focus on a pre-set story, any deviation makes them uncomfortable and they do everything possible in order to bring the game back to their planned out storyline.
At the very least, gamist games tend to be balanced, and Simulationists games tend to help the players believe that they are in the world that their characters are in.
If I wanted that shit I'd play a Japanese "rpg."