I ranked all 20 first moves for white.

Hello

I didn't see the above response, before my last post. However, My point was that the fianchetto line with f3 doesn't have a point against c6. At that point you just wasted multiple moves.

What can white really do here?

At least as black your opponent will have to get aggressive against it, which is what you are hoping for. Isn't that literally why you would play this line? To force your opponent to over extend?

What really gets me though is how Is Nh3 better than the Grob? Black plays d5 threatening Bxh3, and the only defense is g3 which is very prone to pawnstorms.

White plays for e4 like every fianchetto opening ever.

You play it for laughs, which is also the only reason you'd ever play the grob

It's also quite easy to deal with the pawn storms. You simply pass by the attacking pawns; that's one of the pros to holding your pawns back. Unfortunately, if you try this with the grob...well, your pawns are awfully pushed, aren't they?

With Grob your pieces are very pushed, but there isn't really a pawn storm, at least not at 1st, for black to try. You didn't even move your king yet, so how could they really pawn storm? And if they try it, you can always then switch to castling queenside.

Also, after the f3 line that I posted above f3 white can't really play for e4 because black is under no obligation to take. He can just keep the tension and focus on castling. Which he can't really do against g4 without sacking the rook.

And the pawnstorm is not easy to play around at all with Nh3.

The rook and the bishop will soon be double attacking the knight on h3, and the rook also gets an uncomfortable reach near white's king.

Which is why I really can't grasp how Nh3 is better than g4 in human chess.