Absolutely. Most books about Davis mention that his field service in Mexico and tenure as Secretary of War influenced his behavior as Confederate President. For reference, see
Abraham Lincoln had none of this in his background, yet he directed armies in much the same manner as Davis.
Stan, try this. You become President of the Confederate States. You graduated from the U.S Military Academy at West Point, Class of 1828 (23 of 33). You have wartime combat command experience in Mexico, and recently have been U.S. Senator and Secretary of War.
Would you take a back seat and let your subordinates make all the decisions?