Yeah, even if the Axis blast something important with Tabun or Sarin they're still facing in retaliation the complete loss of their strategic mobility - except on rail lines or for the Panzer Divisions.
The Heer without horses is basically an immobile force without artillery or heavy weapons ammunition.
That's what Goering said after the war, when he was being interviewed by Allied interrogators.
"You would have won the war years ago, if you had used gas - not on our troops, but on our transport. Your intelligence men are asses!"
(Even in defeat and captivity, Goering loved to score points and show off.)