This is a very big question. Bigger than most people understand. It goes right to the heart of how we, as individuals, deal with the world around us.

You touched on the problem of randomness. Again, most people just don't think about it. They accept that randomness is an existential threat, i.e. I could get killed crossing the street. But they choose to live in a fantasy world where they imagine they have some control over it.

I wrote a piece on this, talking about when my wife was in an ICU and her survival was uncertain (Random Thoughts 02 - Imagine There's no Heaven). I said that it's out of our desire to tame the randomness of reality that Gods and Devils are born.

To live without G-d or the Devil, to be responsible for all that happens to you both good and bad. To accept that bad things will happen to good people because being "good" does not protect you. Or that bad people, even evil people, will prosper without apparent consequences.

Most people cannot live in that manner. They need the illusion of an orderly, stable reality. They need their G-d, or their guardian angel, or tree spirits, or something. Something that they can pray to and offer sacrifice to in order to feel that "bad luck" can be warded off.

Religion will always be with us in some form. It fills a need.