While doing horsemanship the ropes are needed to communicate with the horse. Really fine signals need to be passed to your horse. Not every rope is made for this. The core mantlefabric and the weight of the climbing ropes ensure a perfect communication with the horse.
The purpose of horsemanship is to refine the communication between you and your horse.
Neck rings are an alternative to the classic snaffle. Like the horsemanship ropes the neck rings serve the communication with your horse. Riding with a neck ring is no sorcery nevertheless you should be able to work your horse with weight and thigh facilities.
To ride with a neck ring may help you to use your weight in a very precise way and to understand the reactions of your horse even better.