Being "warriors" doesn't mean crap. That means the few troops they have left are well-trained, and depend on war for status. War is truely won by numbers; of troops, which Dres and Hlaalu have, and of money, which Hlaalu and Dres also have.
"Warriors" means a terrible lot actually. Seeming that Indoril and Redoran's sole duty has been centered around combat for the last few millenia, they're quite good at it. I mean, really good at it, which isn't a fluffy lined notion. Why are there no Hlaalu at Ghostgate? Becuase they're terrible and clumsy warriors. Why did the Daedra focus on Ald'Ruhn and Ghostgate? Becuase warriors are powerful threats.
Hlaalu has mercenary troops. They don't train their own in "great numbers" at all. Dres has always been firm Temple supporters, and that means, by externsion, reliance of Indoril for civil protection sparing their own skills for slavery.
"War is truely won by numbers?" I did not know war had become such a trivial thing! We've been fighting each other for thousands of years, and we still haven't found the holy grail of combat, I doubt you know it.
I'll use a real example of this. In Ancient Greece, there were two great city-states (well, two that mattered), Sparta and Athens. Sparta was all warrior class, and centered around war, Athens was a democratic money-oriented city-state. First the Persians attacked and we have all seen 300. But they lost. Athens were the ones that beat Persia off. T
Meh. We can all go and find accounts of battles that prove our point. Oh well done though, it dosent mean didly squat really. But, on ths topic though, Athens were only able to send Xerxes back home becuase Sparta had laid into him, and guess what? They didn't beat him. Xerxes needed to return to Persia to stop revolts and was assassinated by his vizier.
Then Athens and Sparta went to war. Athens won.
Japan and China went to War. Japan won. But let me use your own definition against you; the Achaemenids went to war against Greece, and Greece won. So really, your argument is a double edged sword.
The skill of warriors does not matter a whole lot, no matter what romantic notions stories put into our heads. Wars are won trying to get overwhelming odds over the enemy.
Overwhelming odds help. Hah, they do. If you're implying that Hlaalu have "overwhelming odds"? Hah. Nope.