if one argues, why didn't Tolien mention a failure by melkor.. then why doesn't the Silmarilion mention the creation of the Hobbits?
After all they play a part much greater than say, the Ents, and yet the Ents get a mention.
and it could also be surmised that Morgoth would have other failuires far too numerous to be mentioned.
My heresy is such that it doesn't conflict with anything thats written, and yet also complies with the various things writted about Hobbits, and also explains the big question over Smaugs reaction to Bilbo, which surely must be explained?
But... another take is...
Morgoth creates the Hobbits from scratch, in the same manner as the creation of the Dwarves, but they are feckless, without direction, not being possesed of "life". it is only when morgoth spurns them as a "failure", i.e. no longer desires dominion over them, that they do aquire "life", free from the influence of Morgoth, and yet possessed of a "resitiveness".
Sorry that this is somewhat brief.. but I'm a bit pushed for various reasons..
Oh... and as an aside... There's no mention of the corruption of the Ents.. and yet.. and yet... surely this occurred"
Remember, just because something is NOT implicitly written as part of a background, does NOT mean the background does not exist IF the descriptive writing shows such an occurrence by indirect "lighting".