There are some serious drawbacks to the Peloran warrior ethos. They are seriously capable at lone or small unit actions. Never underestimate what several Peloran brothers or sisters can do together. But they don’t do large unit actions much. And that goes to space ships too. I’ve almost never seen more than ten Peloran starships fighting together. Charles wrote a whole thesis on it. Apex Warrior Syndrome. The short version is when you’re the best, there’s no one that forces you to work together to win. The Peloran are the best.