Umm, V61, there weren't all that many Dragons remaining by the end of WC4. The 2 squadrons (each squadron having 10 craft) on the Vesuvius were destroyed in the battle on the way to Sol, 1 on the Lexington was captured by the UBW, and the official fate of the 1 squad posted at Axius is unknown, IIRC, but the odds are rather heavily against their continued survival, since they were flying in support of a group residing on the [excrement] lists of at least 3 governments (Confed, UBW, and Kilrathi).
10 fighters (and likely not even that many; Blair's ship was shot to hell in the Seether battle, and even wonderships die, especially when not flown by experienced vets like Blair) are not exactly going to make all that big a difference, even used as SpecOp vessels (for which they're marginally suited anyhow... there's a lot more to SpecOps than just the vehicle used to get on the scene, and often even the transportation issue is better handled by something as anonymous as a plain-as-dirt transport looking like it's doing normal stuff instead of some wondership trying to sneak in [not to mention losing a transport when something screws up is a lot less expensive than losing the wondership]).
As for the political thing, in a cold war-ish context, where higher concepts take a back-seat to "we must contain the Red Menace" (or insert your color of choice), the Dragon might not raise many eyebrows, but there was no equivalent of the Soviet Union in WC after the Kilrathi were defeated. Peacetime isn't conducive to wartime-type spending or gear of dubious non-terror value (like the stocks of cold war era chemical weapons that the US is working on destroying, for example).