I do not play Bg5 in the classical french, because of the Mc Cutcheon Bb4 variation,
I just do not like to face it, I don't know what to attack if black just plays the Mc Cutcheon with Kf8.
Maybe I could play exd after Bb4, but I really do not know, I believe black is already comfortable after Bb4 Ng-e2.
I often analyze my french games with an engine, black is very often slightly better =+,
but it is still difficult to play, but =+, but in practice the french players often can't convert this and end up worse in the late middlegame nevertheless ... chess is just a difficult game
I know of 2 kasparov losses in the french, against invanchuk and against radjabov,
in both of these games, kasparov had no kingside attack, it was just a positional struggle,
against ivanchuk he got overrun on queenside ... these are good examples for white getting no attack and losing his position quite fast ... I can be glad, that the players on amateur level are often defensive players that have problems to convert their opening advantage ...
I don't think there is another opening for black where he gets so fast an advantage against white.
Tbh. I think 1.e4 is a bit incorrect, because on the greatest level of truth, it just wrong to attack on the king, because the defense is always one piece up, that is the king ...
it is far more logically to play on queenside, get space advantage and win a pawn ...
because black is not a piece up on queenside ... but I chose 1.e4 nevertheless because on my level greatest level of truth is not that important and 1.e4 gives me more fun