Agreed. AFAIC, ethics ultimately can only be formulated (given a foundation) between individuals and groups with common aims, which in turn results on prohibitions on certain activities within said groups because the outcome of this is deemed to be mutually/socially beneficial. These prohibited actions happen, by and large, to overlap with what we're evolutionarily predisposed to recoil at, due to a sense of empathy and a desire for reciprocity. This works when there is a mutuality of objectives in place (e.g. within the same species), and obviously those who violate said social compacts can be ostracised, imprisoned and so on as a deterrent, but it is essentially a form of social compact, with purely internal terms of reference.
Trying to claim that certain higher beings should just roll over and give up because their world was shattered and the aether from it diluted, and that they should value the lives that came thereafter as equivalent to what they lost, and that they're wrong if they don't so, is in the end, nothing but an opinion. I have no problem with granting that both sides have a strong rationale for their actions, and are champions/heroes of their cause and villains to those whom they obstruct. Certainly, there are consequences in that either will face opposition in standing up for what they believe and in this case there is very little room for the two sides to reconcile their aims, as things stand.
The writers are, of course, free to have their own view on whom they support, and which side is "wrong", as are other fans, but that alone doesn't sway me much. That said, the writers certainly have it in their power to add twists and turns which may change my view as things go on, but that could also be in the form of losing interest in the specific subplot if it's something dull like slavish tempering being the ulimate cause.