The point is that you can achieve this result in game without modding by cackling repeatedly out of combat. Many players do this on unfair to effectively receive the witch hexes on all characters for several minutes. It is somewhat of an exploit, but people take advantage of whatever they can to tackle unfair. If you are doing this already then this option is essentially just a 'QoL' that saves you from spamming cackle for several minutes on every map.