Part of Gidgiddoni’s tactics was a scorched earth policy. He pulled all of the people and their flocks from the land near to where the Gadiatons were, and moved them all north toward the land Bountiful. While that conceded land to the Gadiantons, it did not provide them any way to raid for food. It also concentrated the Nephites in a smaller area, making themselves not only more defensible, but providing more people in a concentrated area to fight against the Gadiantons, should they come upon them.
Of course, while this policy had advantages, it also had the difficulty of uprooting peoples and lives. Many were greatly inconvenienced by the actions. It was not a painless solution.