OP didn’t say he was afraid, but that it was unnecessary which is objectively true - I don’t personally have a belief in gods, you have a belief in a particular god but we can both get value out of acceptance and serenity.
You get value out of peace and serenity, yes? So do I. I take you at your word that you believe in a particular god, I would assume you take me at my word that I don’t believe in any gods.
If both of those things are true, then gods are not required to take value out of the idea of serenity. The only way that this could not be true as if one of us are lying.