"can the same not be said of Haig but on a much greater scale."

No Raggy it couldn't.

Haig was a soldier. A Divisional Commander who kept his troops intact as a "force in being" in extremely difficult circumstances against an enemy force of greater numbers and greater superiority in artillery. After the initial German surges of 1914 and 1915 Haig did not lose one single battle to the Germans. He is also credited with having led the most successful offensive campaign ever mounted by the British Army throughout its entire history.