What exactly do you mean by "objective?" It is your proposition of morality.
Oh, so much here.
Beyond there, there's the flawed tacit assertion that any "amoral" argument is inherently immoral by simply failing to address morality.
An amoral argument doesn't "fail to address morality," it excludes it by definition.
But I think you're smart enough to figure that and everything else out.
You'll have to argue with yourself now.
Bye.