Ships had mechanical fire control computers linked to the guns that compensated for the movement of the ship and other things, including the coriolis effect.
Also, by the time the allied forces were engaged in Belgium, most of the artillery fire was what they called toot, or Time on Target. The correction and walking toward a target was a movie effect.
Likely, you have never been on the wrong end of an artillery barrage but when you hear the whistle of an approaching round, that one is going to miss you. If you hear it, you have time to take cover from the next incoming. Toot didn't give you that time. 20 or 50, or 100 guns in different positions and of different calibers and differing distances and flight times would arrive within a second or two of each other. Couple toot with proximity fuses that were used by arty, after the Battle of the Bulge and you would understand why artillery is called The King of Battle.