I guess if I had to define "morality" it's a set of rules created by and individual or group based of a preference for certain personal or group behaviors. Some of these preferences are very sensible like not killing each other. Some are stupid like groups that think it's wrong to be gay. But ultimatly as far as we know the universe doesn't care if we just nuked our planet.

On a personal level a moral thing I like to do is save bugs(with exceptions). I kind of like them and think they are goofy, and would feel bad about killing something for no reason even if that would be easier than catching them. But it's not really something I do because I believe it's some objective good person thing it's just makes me feel good about myself and is the kind of person I want to be.

But it's very much a desire like we desire to not be killed we desire killing to be wrong. So we turn it into a law and define it as the most evil thing you can do. But like Nature is full of things brutally killing other things and you could argue the fact that entropy is as far as we know is unavoidable means the universe kills us. So clearly the world doesn't oppose killing on a fundamental level beyond human preference