And there's the rub, isn't it? We are on our own. If we don't make the most of our lives, it's our own fault. Sure, we're gods, but gods without any real power. The only power we have is to live for the present—but in a reasonable way.
I don't know about you, but I'll take Christianity, with a personal (in the sense of having personality) god, who doesn't just show the way, but lives inside us to enable us. We aren't on our own.
We might still appear powerless, but we have "exceeding great and precious promises" that the Holy Spirit is within us and that God is in the process of re-creating all things new—including not just us, but the whole of creation.