It’s a matter of objecting to the idea that “sufficiently non-human” is a target we should be aiming for in the first place. It is an unattainable goal, yes, but more importantly it’s not a worthwhile goal.
I think you’d have a hard time characterizing a race as more warlike than humans, when war is a human invention. Again, you can make them less inclined towards peaceful conflict resolution, but then you’re just limiting the range of expression without getting any real benefit out of that restriction.
I would have to say that some of the things you think are difficult/impossible to conceive in speculative fiction makes me sad.