FFG had a miniatures game already before they started X-Wing, called Dust Warfare.They also produce 7 different LCG's, none of which are compatible with each other.Trying to run two competing incompatible miniatures games is not a smart business strategy.
They don't compete with each other. They don't have the same interest groups in nearly the same way. We're talking two different Star Wars miniatures games. Not two different Miniatures games. There is a large difference there.