That is exactly the problem with hypotheticals. They are often completely false examples of nothing.
What is the definition of life?
This always circles back to God Himself.
Yes, it's not about an arbitrary consequence of whatever He might choose to do... it's about who He is.
You've used the word "life" many times and have made it the standard, yet you've yet to define it.
P.S. Thanks for your time, I always appreciate what you have to say.
Well, this is the first time you've asked me to define the term "life" and this is not nearly so simple a topic as most people who attempt such discussions tend to treat it as. I've spent the better part of a year writing and rewriting a single chapter of a book that makes an argument for the existence of God from first principles, a major point of which has to do with this exact issue. Up to this point, our intuitive understanding of the term "life" was sufficient to make the point and I saw no reason to complicate it. We are, after all, living beings and so what it means to be alive is rather intuitive to us. It is, however, a completely valid question and so let's get into it.
One important clarification needs to be made before just blurting out the answer.
The standard of morality, rather than being merely "life", is most accurately stated as "rational life". In other words, I am NOT talking about biology (more on this in a moment). Indeed, you'll see immediately that "rational life" is even more directly associated with the necessarily rational and living God we've been discussing. Now, I'd define this more precise term as follows...
Rational life is an active state of existence characterized by consciousness, the capacity for logical thought and the ability to make purposeful, self-directed choices.
Let's not leave it there though because someone reading this will surely jump to the obvious objection. Let's address the fact that God has, on numerous occasions, deliberately taken human life (i.e. human life is rational life). He destroyed the world with a flood, destroyed Sodom and Gomorrah and commanded Israel to wage wars that resulted in the deaths of thousands. How can such actions be consistent with rational life being the standard of morality?
The answer is that preserving biological life at all costs is not what is meant by promoting rational life. If it were, then killing someone in self-defense would be immoral, executing a murderer would be immoral and even God Himself would be morally obligated to preserve the lives of those who deliberately destroy the lives of others.
Such a standard would make justice impossible!
Rational life necessarily involves more than merely remaining biologically alive. It involves the ability to think, to make choices and to act according to principles consistent with one's nature as a rational being. Those principles include justice, which is indispensable to the existence and flourishing of rational beings.
Consider Noah's flood. God destroyed the world because Satan was attempting to corrupt the human race through the Nephilim. Had that corruption succeeded, it would have made God's plan of salvation impossible. The entire human race would ultimately have been lost without any possibility of redemption or eternal life.
The flood, therefore, was simultaneously an act of mercy as well as judgment! God preserved Noah (who was perfect in his generations (i.e. his genealogy - his genes) and his family, thereby preserving the human race and the possibility of salvation through Jesus Christ who HAD TO BE fully human. The alternative would have been the eventual destruction of Adam's entire race without any means of salvation whatsoever.
In other words, God's act of judgment resulted in vastly more life than it took! Indeed, the life He took was temporary. The life gained was eternal. He is no fool who gives up what he cannot keep for that which he cannot lose.
The same fundamental principle applies to God's other judgments. Justice sometimes requires the destruction of those who threaten the lives of others. The preservation of innocent life can require the use of deadly force, and the protection of rational life cannot be accomplished by granting wickedness the right to destroy it.
The question, then, is whether God's actions are consistent with the principles necessary for rational life to exist and flourish. That is an objective question with an objective answer. God's actions are righteous because they are consistent with those principles. Indeed, because God is necessarily living and necessarily rational, His righteousness is an expression of His very nature. God necessarily acts in accordance with the principles proper to rational life because those principles are inseparable from His own necessary existence as living and rational being. That is why rational life is the standard of morality and why God Himself, being necessarily rational and living, is the ultimate expression of that standard.