@9579
"1. g4 is a very bad move"
++ Yes, 1 g4? is the worst possible first move, and the only one that loses.
"that probably doesn't lose by force"
++ 1 g4? loses by force. Please present your own line where in the end white holds the draw.
That is how chess analysis works. One side tries to win, one side tries to draw.
In the end one side succeeds and one side fails. The failing side must find an improvement.
If the failing side cannot find an improvement that succeeds, then proof is final.
I think that the reason black's advantage remains at round about -0.7, no matter what white does is because white is playing engine moves based on short term assessments rather than more strategically powerful moves. If black really was winning, I think the advantage would start to show. I've played many hedgehog-like positions where I'm given a similar disadvantage by the engine or maybe even up to 1.8 and yet on carefully analysing, there hasn't been a forced win and often I've gone on to win.
I'm afraid all you have achieved is to convince me that 1. g4 is a very bad move for white but is one that probably doesn't lose by force.