He's unlike us

Many of the strange laws and practices of the Old Testament are grounded in the need to teach people that God is unlike everything else. In his nature and character, he is unique; he is completely other than humanity and anything else. For Israel, that was a truth that had to be reinforced at all times. Otherwise, God might be thought of as ordinary.— Supernatural: What the Bible Teaches about the Unseen World—And Why It Matters, page 72

lt;idle musing>
It wouldn't hurt us a bit to realize that, either. We like a tame god, one we can control and manipulate. Fortunately, we don't have one!
</idle musing>