im afraid Cybertron DOES have an organic origin since BM was a full fledged authorised transformers serise, and it seems to make sense considering cybertron is actually Primus himself. thats like the argument that Powermaster prime doesnt exist, he's simply a remake of convoy...when actually due to Marvel UK giving him an origin in their official TF comic continuity..he is a character in his own right.
many people argue the Myth of the Primes, do we take the show as cannon, where optimus is actually three differnt parts and prime is simply part of his name...or due to the invention of the matrix, rodimus prime and Marvel comics (furrman) we understand that optimus is part of a long line of Primes - sentinal prime, prima etc.
the only way to keep everyone happy is the (impossible) alternate reality theory. EVERY differnt serise, comic line, toy line etc is it's own unique TF timeline and universe. so Armada is a differnt reality to G1 the cartoon, Dreamwaves G1 is a differnt reality to the G1 catoon. there for, as Beastwars and Beastmachines are concerned, the possible future of G1 will reveal that Cybertron, since it's alive with atmosphere etc, has an organic core bloodline. According to dreamwave cybertron attended budding galaxies and nutured them...just as unicron destroyed them.
we carnt take anything for granted because so many people and races have interfered with cybertron and it's numerous inhabitants.....so everything is possible