[Aiwendil]

Your examples of Beethoven's Ninth & LotR don't work for me - if we only had those works in the forms you describe (which i can't think we would have, as there would be no interest in having them, so no publisher would make them available) & all we got was a slew of different versions, no one would no which one to take seriously.

You don't think that if The Lord of the Rings existed only as fragments, it would be of any value for someone to connect and edit those fragments to create a fully realized narrative? Would this thing not have value in itself, even though it was not "canonical" Tolkien?

Perhaps you do in fact think that it would be worthless. Fine. But obviously, a lot of people would disagree with you.

If FoG is the young Tolkien's mythologisation of his experience of the Somme, which I feel it is, to a great extent, & Tuor is the Older Tolkien's attempt to write a legend based in ME, detached by time & his own lifetime of other experiences, the two stories will not fit together in the way you assume.

Who said that we assumed they would fit together in some particular way?

I could argue that, in fact, the old FoG is not really as different from the later Tuor as you claim. But that is beside the point. They are both part of that complex body of source material called the Silmarillion. There are innumerable ways in which they could be put together. We have put them together in one particular way, because that is a way that we find interesting.

Yes, we have characters with the same name recurring throughout the Legendarium, but are they the same characters.

I think that's a meaningless question. They are not real; they are defined only as logical objects within the network of source material. In one sense, they are the same characters. In another they're not. That's purely a matter of definition.

which part of her story do you throw out - The beautiful scene of her rejection of the Ring, & repentance for her 'sins' in LotR (G1) or her role as leader of the forces of the West against Sauron, a role which Tolkien says is equivalent to the role of Manwe in the battle against Morgoth (G2)?

You don't throw anything out.

Instead, you create a new thing out of the old contradictory elements. If you like, you create two new things - each one reconciling the contradiction in its own way.

To take bits from both versions of these characters & try to create a 'canonical' Gollum (1+2 = ?) or a 'canonical' Galadriel seems doomed to failure

I think that perhaps you misunderstood some of my post. I didn't use the word "canonical" at all except when I said something about the ambiguity inherent in the word and when I said that "canonical Silmarillion" is a misnomer. As I said, there is an infinite number of possible Silmarillions. None of them is "official" or "canonical". But I think that a great many of them have value.