Actually, Haxor295, he has a point, and a good one based at least in part on economics again.
Just like automobiles are much more expensive than horses, an airship will cost many times the expense of trained flying mounts. They also won't require the same kind of open space for a landing field.
IOW, it would probably be cheaper and stealthier for raiders to operate with flying mounts than airships of their own.
And, FWIW, the same goes for any kind of "Air Rangers" that may be formed to combat the raiders...
This is not to say that you can't have both- they have different strengths and weaknesses. For instance, it would be next to impossible to train flying mounts to operate in unison as aerial draft animals to lift heavy cargoes- something an airship does quite well.
ah, i see your point. Psycotic Jim, you have my apology