It's a joke line. Black plays 5...Ne7 and he is fine. Here, the pawn is pretty clearly poison.
Why don't you try that against some 2400-2600 FIDE rated player.
It's definitely a weakness.
My 152k database of recent games since 2007 has over 9600 Frenches, and only 5 where a 2400 player plays 5 g4 - no examples of a 2500+ playing it, so it would apparently be difficult to achieve your challenge.
Using database stats from online playing sites proves you know as little about statistics as you evidently know about chess.
Actually, I know more about chess than the average person, just no so much about openings.
you're no different than my former beings on chess.com. you keep posting weak stuff, claim you're a very strong player, use computer analysis incorrectly, give diagrams and yet, your rating hasn't passed 1400.
btw your latest 'database'-you should clearly know why the 'statistics' about g6 are ...bad.
I never said 5...g6 was good.