When humans think about morality, they think it's black and white, good vs evil, right vs wrong. But in reality, there are just many shades of gray. But for some people, and animals, in particular, their moral compass is inconceivable to humans, for they operate on a blue and orange moral framework. A predator isn't evil because they kill their prey, to them, it's merely food, nothing more, nothing less. And what can better represent the foreign moral framework of blue and orange morality than a dragon of the same color?

Got the idea of Blue and Orange morality from here:
https://tvtropes.org/pmwiki/pmwiki.php/Main/BlueAndOrangeMorality