Honestly, isn’t it MORE amazing to say “You know what, I do NOT fear divine retribution, yet I still choose to behave in a way that is morally grounded, based on my own belief that hey, being nice to people is pretty cool”? Kohlberg’s theory of moral development puts “fear of punishment/promise of reward” literally at level 1. It’s like…the first thing. “How do I avoid punishment” and “what’s in it for me” are the absolute EARLIEST ways in which we learn to determine moral and ethical behavior.
Not bashing religions, because I find spirituality and faith beautiful qualities, but people who claim you can’t be moral without them aren’t giving the matter much thought.