Those who know the struggle, comprehend the importance of faith. We need to believe in something, or we will easily give up. If we lose belief in ourselves, faith will give a way to go on and push through the fear and confusion.
Humans really need hope, faith, belief, in order to fathom the cruelty and darkness of the universe (world). And sadly organized groups win out of the yearn to discover for yourself. Religion was/is a cultural and world positional thing; not even closed to what it has now become