Why not...just not? And see what happens? We're all guaranteed to die anyway, so what is there to lose? It's not rational to bet on the end of the world in any possible situation.
I'm having similar thoughts a lot recently, which are far from original to me, yet I am disturbed by all the people who apparently don't have them.
Like, the richest guy in the world cares about union busting and tax breaks at the moment, but why? I literally can't imagine anything he can gain from being a bastard at this point, and so I can't even get viscerally angry. It's more like contemplating the mysteries of a tornado. What the hell makes it go and what would stop it?
And as far as I know, autonomous weapons don't inherently involve scorched earth scenarios. Perhaps in the far future the worst war we have will be each side attacking the other's autonomous weapons and then calling a ceasefire because humans are too costly to be in the frontlines.
Think of it through the lens of an iterated prisoner's dilemma: if I suddenly develop deathbots and you don't have them, it changes the payoffs for defection/cooperation which could cause me to change strategies and kill you.
I would recommend Axelrod's book "The Evolution of Cooperation" for ideas surrounding this.
With the above information, what would you do, if you were a state actor of an advanced country? Surely, (1) you either want to develop these yourself, or (2) ensure that nobody else develops them. (2) can be achieved by international treaties, but the question is whether it can be enforced. If state actors don't trust option (2), then the only option left is (1).
Because the consequence being the end of the world rather than just a large part of it is what keeps the peace.
Perhaps you meant dispassionate?
Expressing this quality in a single word is a challenge.
At the very least weapons are controllable; they have a kill switch. Things like SARS-Cov-2 do not have a kill switch.