Precisely, jno. Many other factors may be involved and it may, indeed, all be very indirect. The link also says that undetected factors, such as lifestyle or upbringing could contribute, and there are other views which say that religion can lead to self-doubt, and failure, and thereby have a negative effect, and I think that's true in some cases, so the report is not conclusive.
Jock, I'll ignore your sarcasm, and simply say, as I've said many times, that I do believe in the existence of the soul, but that's not because someone else told me exists, or because I read about it in a book, and I have no reason to connect it in any way whatsoever with the God you worship either. Why would I? I doubt there is a God, but if there is, then I don't believe for an instant that it's the fellow the bible talks about. It would have to be something far bigger in all ways than that.
I'm genuinely curious, Jock, and I would love to know the answers, but I can't accept answers that, given a little rational thought, very clearly do not gel. What we need is for someone who is religious to come up with a really positive, logical, argument to support his case. I posted an invitation by way of a question to that effect a little while back, but sadly there were no takers.
Any offers? It would make a fascinating debate.