Returning a question is a child's tactic that avoids answering the original. So how about answering the original question?
"what good is there in religion that can't be achieved without religion?"
There is no answer to either of those.
That should seem to mean,
@Anthem, that there is therefore no need of religion, except perhaps habit.
So then we come to another question: is there anything about religion which might in fact be harmful? For example, without a requirement to believe something "religiously," there could be no such thing as heresy, and therefore no need to punish those who don't believe as required. And religions have been very robust throughout history in punishing those that don't, including with gruesome death, for example by burning, or with such things as excommunication or disfellowshipping, which can cause enormous social harm.
As an atheist, I've never even thought about punishing those that believe in gods. I have a wealth of history to show me that many god believers have certainly thought about punishing nonbelievers, and gone on and done it!