Self reflection is a positive thing.
What if such a creature doesn't have the capacity to reflect...only kill or expand.
If it can be built, some scientist will build it.
Just because it's there.
Just a new kind of malware.
For the Hell of it.
We sort of have that with muslim Palestinians. Biomechanical robots would be much more pleasant to have around us.
Then we can out-think it. And that means we can kill it, because that's what we do best. Once it gets smart enough to be frightened of us, we can get along just fine.
Human beings aren't, in the final analysis, all that nice, but sometimes we try, if there's something in it for us. We might make an AI that's smarter and faster than we are but I doubt we'll manage to make one meaner.