What has your attention matters. If you are looking down at your feet, you can’t find, follow, or focus in on a target. When you take the time to train your somatosensory and vestibular systems they can function at a high level without much attention. This lets your visual and auditory systems have your attention.
Following a target requires your attention. If you want to move while following that target, your vestibular and somatosensory systems need to be working for you in the background at a high level.
Train the vestibular and somatosensory systems, execute at a higher level with the visual and auditory systems.