Uh yes it is. The Taurians spent huge amounts of money investing in their WarShip fleet throughout the Age of War purchasing large numbers from other states including the Terran Hegemony. The 3025 TC had nowhere near the funding nor industrial capacity to even come close to replicating that feat. I don't believe that the Taurian Concordat even had the capability to manufacture JumpShips let alone WarShips.
Which is why the history of btech is utterly, pants on head, *stupid* stupid to the level where we must assume that the new thing in human space is the universal use of lead piping for water.
241 years pass between the exodus and 3025. The TC is the only state that is A. not at war and B. has a safe internal space (the cluster section). We also know that the internal population of the cluster (ignoring outside) was likely over 5 billion or so, although it could have been far higher. (The population of the TC in 3145 is over 33 billion, but that counts external worlds, but equally doesn't count the worlds the TC lost ). The TC is also specifically called out as one of hte best educated of the periphery states, equally some of hte successor states.
Now, let's look at what 241 years
means. that was 1866 if you go for 241 years before the launch of the first jump ship. If you look at the modernization of china in 1976 you weren't simply pre-modern, you were back in Imperial China, pre-Opium war. 241 years ago, we were just barely entering the industrial revolution and people were wondering about this new fangled thing called steam tech. 241 years isn't simply enough time to recover from a war-- it's enough time to train entire generations of engineers-- from scratch. It's actually a longer period of time than it took to develop the technologies--
from scratch. Even presuming Mentor of Arisia (er, comstar) had managed to destroy every single diagram of advanced warship engines, you had more than enough time, and an equal population to terra, to redevelop the techniques from first principles-- and again with the advantage that you knew it could be done.
Now obviously, this is just the setting. But honestly, it's one of the things that has increasingly kept me out of btech campaigns lately. I'm a professional historian. And to be honest, the lack of industrial progress in betch is increasingly hard to suspend my disbelief for. FTL doesn't bother me. Fusion engines that put out far too much power don't bother me. The idea that a power that is more or less at peace (yes, they've had pirate raids, but nobody's dropped hell burners all over their homeworld) cannot even start to recover in 241 years-- a longer period than most real world nations have *existed* under the same government, is something that just blows suspension of disbelief right out the door. It doesn't require comstar-- it requires again, the assumption that Either Mentor of Arisia or Gharlane of Eddore is interfering.