This is only continuing the trend started in ww1. The big paradigm shift of ww1 was that you can stop any number of men with machine-guns and artillery. So you need more space between the men. Tanks allowed to cover the men for an assault, so offensive could still be done.
Now, with the accuracy of the artillery and missiles and the drones to scout, tanks are also destroyed before they can accomplish their mission. So the no-man’s-land is even larger than before.