Ever heard of the phrase 'the road to hell is paved with good intentions'? I don't think most all-powerful beings mean to be tyrants, they just forget how strong their powers are. It's very easy to go from "my people love me and would do anything for me" to "I'm using my powers to help them, of course they wouldn't mind, they love me".

That's the difference between a benevolent leader and a tyrant: free will. The moment that line is stepped over, the moment a god assumes they are perfect and so they know what each person wants and doesn't ask them anymore, that's when they've gone too far.

[It's dangerous, for him to say this. Kid is a god himself, or a god-in-training, or whatever he is. But Kid is also way more human than any god Shiro has ever met, and maybe Kid can learn this lesson before it's too late for him.]

It's possible for humans with a lot of power to make the same mistake. Kings have become tyrants since the beginning of time. The difference between a powerful man and a god is that men can be overthrown or killed if they go too far, or if that's impossible then all the people have to do is wait half-a-century or so and time will take the tyrant instead. That can't happen with gods.