If they were true embodiments, then that would definitively describe the nature of the Force, including the fact that a "balance" between light and dark exists. But the fact that the Ones have been given a species name, and that all three died, yet the Force continued to exist, suggests that they are merely representativejust another group of people, immortal though they may be, who have their own viewpoint of the nature of the Force, no more legitimate than others and modeled themselves after it.
Regardless, their existence seemed to be relatively unknown, and Anakin Skywalker still seemed to believebelieved in the Living Force, despite having met these beings. So itso this codified belief seems to be anothera minority view that is not necessarily more legitimate than others.