Because it was expanded upon and built upon. Just like the argument that the GE has lots of ships was. This is why the tally system is effective because it doesn't lump arguments like that together but considers and counts every aspect of them.
Question on that: How did the SE win then? Because the "they have Sith" argument was the only good argument in favor of the SE.
Not like it matters. Just wondering.
P.S. Nice to see your being good about the outcome by the way, some people seem rather peeved...