The problem with speaking in generalities (about religion, or other) is that you likely have, or present, an incomplete picture, and one which fails to cover the very wide variety of things under that topic.

For example your categorization of "cannot tell fantasy from reality" would not be a good description of say a buddhist."

Equally binding a view of mental health to religion seems a stretch. Perhaps you have experienced that, but I suspect that connection is not universal.

I didn't downvote you, I say these things to explain why you likely were downvoted. Not because your post was about religion, but because your viewpoint is both unnecessarily broad, and kinda missed the point.

The point was that having an experienced advocate on your side, who understands the process, who isn't under the mental strain of a recent terminal diagnosis, can assist you with good decisions.

If you are in a community of faith, and it's likely that the leaders in that community have walked this path before. If you are not then seek that person from wherever you are in community.