Argument by literary artistry is not an argument and is often foolish and wrong.

Contrary to your literary flourish, only non-religious people can (but might not) be unarguably moral. The reason is that the motives of a religious person are always suspect. Is a religious person moral because of commitment or because of fear from some kind of hell or because of a craving for some kind of heaven? That doubt does not exist with a non-religious person.