[Macalaure]

I was just writing about the same that Boro just did, so I'm making this short.

It is understood that Tolkien disliked allegory and looks for applicability.
In this light, Tolkien's interpretation of his scene at Sammath Naur is the way he applies the scene to himself. This does not mean that his interpretation is the only valid one. If it was, it would get us dangerously close to allegory.

The parallel between the scene and the Lord's prayer has never occurred to me before, but now that it is mentioned and explained, I see it. Very nice, though I still don't like the idea of divine intervention causing Gollum's death.

However, this is just Tolkien's application, not an imposed and uncontestable explanation, and noboby is forced to follow it. Edit: To say this view reduces the scene is a little hard, in my mind.