Originally Posted by
purgatori
Regardless of the degree of sophistication involved in their construction, the fact remains that they are not ontologically necessary, non-contingent beings upon which all non-contingent phenomena depends. They are themselves part of the created order. In fact, until contrary evidence emerges, I would hypothesise that these beings are not even capable of the sort of free exercise of creation that the Amaurotine engaged in. They may be extremely powerful, but in every way that matters, they're nought but false gods.
I think it most likely that you're correct, but I wouldn't be totally caught off-guard if it turned out that Hydaelyn engages in tempering. After all, we don't know what the subjective experience of being tempered is like. Perhaps when Hydaelyn was speaking to us, this was itself a symptom of tempering. As we know, though, she has grown weaker over the course of the game and no longer speaks to us, which may be a sign that her hold over us, and other WoLs has diminished, and they are able to act in ways contrary to her intent.
On the other hand, tempering has been shown to persist even when a Primal has been vanquished, so this theory probably doesn't hold water.