It helps you form a better bond with your horse if done in a postseason way.
It helps when done in a positive way! If you yell at the horse for not understanding it will stress out the horse
It helps make the bond between a horse and rider stronger, but it can stress the horse if you don't break down the training methods so the horse understands it.
It also depends on the horse
It also depends who you work with.
It helps with cummication if you're not to aggressive.