It is beneficial to believe in a Creator and an afterlife even if these things cannot be proved. I provides comfort, answers to existential questions, allows for a feeling of community among different people around the world, establishes a common set of cultural values and provides people with a sense of hope.
Even if we posit the existence of both, how does that knowledge even begin to help any person figure out which of the tens of thousands of religions purporting to explain those existences are true, or if any of them are?
...allows for a feeling of community among different people around the world...
So do beliefs in Santa Claus, the Easter Bunny, and the tooth fairy.
...establishes a common set of cultural values...
So does Hollyweird and whatever dreck is on TV.
...provides people with a sense of hope.
Well, we all know who bandied about the word "Hope" to deceive millions of people both in the US and abroad, don't we??!!