I disagree. Now you’re using (motorized…expensive) cameras to get a delayed and imperfect position and direction of your kite that you then have to process further to get more accurate data out of, which you would have to learn how to do, and hope the result is good enough to use. Much better to skip that and just put some sensors on your kite that transmit accurate information to your ground station, or other kites, with millisecond delay. After you’ve figured out how to control your kite, you can then see if you can skip this, but you probably shouldn’t as there is no real cost to this and it adds redundancy.
You would still need cameras for foreign object detection though I think.
It’s like in VR inside-out vs outside-in tracking: https://pimax.com/pose-tracking-methods-outside-in-vs-inside-out-tracking-in-vr/ or like how in autonomous vehicles it would be good if every object broadcast its position. See also: Swarm Robotics.