HandRef can be thought of as a "redirect," which is useful for making
Unity Component configurations flexible with limited setup. For example, if making a prefab containing multiple hand-referencing components which should be usable with either hand, it is more convenient to have a single
HandRef at the root of the prefab (to which all the other Components connect) and connect only that to the desired hand versus having to connect every Component individually for every instance of the prefab.