We follow a God that just one person saw. Why God don't talk directly to all of us?
Too much trouble? Is God testing us? Is God shy? Maybe he likes secrecy!
We believe in what God said to just that one person. And God always say to follow that person - the messenger - and do what he says and do - he is the perfect role model. That one person has the power on all the others. Why does God need that? Why does God needs a human to talk for him?
We need to believe in stories to prolong our mortally. We are not ready to live so shortly.