A well-known Christian leader was reading his Bible on a flight when the guy next to him said, “I don’t believe anything in that book. It’s all myths and garbage. I’m an atheist.” Or something like that.
To which the Christian replied, “That means there is a sin in your life that you are not willing to admit or give up IF the Bible were true, and there is a God.”
The man broke down and admitted that the Christian was correct.
Same truth applies here.
“I’m an atheist” => “I don’t want to be accountable to anyone but myself”
Circular logic.